Make panel headers the same size

resources/chat_window.ui

@@ -976,10 +976,16 @@ QToolButton:pressed {
                </property>
                <item>
                 <widget class="QWidget" name="info_panel_title_widget" native="true">
+                 <property name="sizePolicy">
+                  <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                   <horstretch>0</horstretch>
+                   <verstretch>0</verstretch>
+                  </sizepolicy>
+                 </property>
                  <property name="minimumSize">
                   <size>
                    <width>0</width>
-                   <height>18</height>
+                   <height>22</height>
                   </size>
                  </property>
                  <property name="styleSheet">