Improved tooltips and removed those for self-explanatory controls

resources/blink.ui

@@ -68,7 +68,7 @@
        </size>
       </property>
       <property name="toolTip">
-       <string>Type text to search the contacts list and press return to start a session to the selected contact </string>
+       <string/>
       </property>
       <property name="inactiveText" stdset="0">
        <string>Search Contacts or Enter Address</string>
@@ -268,7 +268,7 @@
        <enum>Qt::TabFocus</enum>
       </property>
       <property name="toolTip">
-       <string>Switch between audio sessions and contacts list</string>
+       <string/>
       </property>
       <property name="text">
        <string>Switch to Calls</string>
@@ -284,7 +284,7 @@
     <item>
      <widget class="QStackedWidget" name="main_view">
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <widget class="QWidget" name="contacts_panel">
        <layout class="QVBoxLayout" name="verticalLayout_8">
@@ -765,7 +765,7 @@ buttons below.</string>
              <enum>Qt::TabFocus</enum>
             </property>
             <property name="toolTip">
-             <string>Hangup all audio sessions</string>
+             <string/>
             </property>
             <property name="text">
              <string>Hangup all</string>
@@ -790,7 +790,7 @@ buttons below.</string>
              <enum>Qt::TabFocus</enum>
             </property>
             <property name="toolTip">
-             <string>Create and terminate conferences</string>
+             <string/>
             </property>
             <property name="text">
              <string>Conference</string>
@@ -863,7 +863,7 @@ buttons below.</string>
      <x>0</x>
      <y>0</y>
      <width>285</width>
-     <height>22</height>
+     <height>21</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuBlink">

resources/contact_editor.ui

@@ -45,7 +45,7 @@
    <item row="0" column="1">
     <widget class="LineEdit" name="sip_address_editor">
      <property name="toolTip">
-      <string>SIP address for the contact</string>
+      <string/>
      </property>
      <property name="inactiveText" stdset="0">
       <string>user@domain</string>
@@ -112,7 +112,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Clear the existing picture</string>
+        <string/>
        </property>
        <property name="text">
         <string>Clear</string>
@@ -134,7 +134,7 @@
    <item row="1" column="1">
     <widget class="LineEdit" name="display_name_editor">
      <property name="toolTip">
-      <string>Name displayed in the contacts list</string>
+      <string/>
      </property>
      <property name="inactiveText" stdset="0">
       <string>Contact Name</string>
@@ -163,7 +163,7 @@
       </sizepolicy>
      </property>
      <property name="toolTip">
-      <string>Group the contact belongs to</string>
+      <string/>
      </property>
      <property name="editable">
       <bool>true</bool>
@@ -202,7 +202,7 @@
    <item row="5" column="1" colspan="2">
     <widget class="LineEdit" name="chat_aliases_editor">
      <property name="toolTip">
-      <string>Used to combine chat sessions from multiple recipients</string>
+      <string>Chat to these addresses are combined in the same window</string>
      </property>
      <property name="inactiveText" stdset="0">
       <string>List of SIP addresses separated by ;</string>
@@ -234,7 +234,7 @@
       </sizepolicy>
      </property>
      <property name="toolTip">
-      <string>Local or remote storage for the contact</string>
+      <string/>
      </property>
      <item>
       <property name="text">
@@ -254,7 +254,7 @@
       <bool>false</bool>
      </property>
      <property name="toolTip">
-      <string>Subscribe to the presence information published by this contact</string>
+      <string/>
      </property>
      <property name="text">
       <string>Subscribe To Presence</string>
@@ -267,7 +267,7 @@
       <bool>false</bool>
      </property>
      <property name="toolTip">
-      <string>Subscribe to the sessions of this contact</string>
+      <string/>
      </property>
      <property name="text">
       <string>Subscribe To Dialogs</string>
@@ -314,7 +314,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Cancel and close window</string>
+        <string/>
        </property>
        <property name="text">
         <string>Cancel</string>
@@ -330,7 +330,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Add/edit contact</string>
+        <string/>
        </property>
        <property name="text">
         <string>Add</string>
@@ -348,7 +348,7 @@
       </sizepolicy>
      </property>
      <property name="toolTip">
-      <string>Default session type when double click the contact</string>
+      <string/>
      </property>
      <item>
       <property name="text">

resources/incoming_dialog.ui

@@ -680,10 +680,10 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Reject the session on this device only</string>
+        <string>Reject the session on this device</string>
        </property>
        <property name="text">
-        <string>Busy</string>
+        <string>Busy here</string>
        </property>
       </widget>
      </item>
@@ -715,7 +715,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Accept the session</string>
+        <string/>
        </property>
        <property name="text">
         <string>Accept</string>

resources/session.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>275</width>
+    <width>327</width>
     <height>62</height>
    </rect>
   </property>
@@ -55,7 +55,7 @@
         </font>
        </property>
        <property name="toolTip">
-        <string>Remote party</string>
+        <string/>
        </property>
        <property name="text">
         <string>test@example.com</string>
@@ -143,7 +143,7 @@
         </sizepolicy>
        </property>
        <property name="toolTip">
-        <string>Negotiated audio codec</string>
+        <string/>
        </property>
        <property name="text">
         <string>Audio (PCM 8kHz)</string>
@@ -416,7 +416,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Session duration</string>
+        <string/>
        </property>
        <property name="text">
         <string>0:00:00</string>
@@ -508,7 +508,7 @@ QToolButton#mute_button:pressed {
           </size>
          </property>
          <property name="toolTip">
-          <string>Put the session on hold </string>
+          <string>Toggle hold status</string>
          </property>
          <property name="styleSheet">
           <string>QToolButton {