feat(Chat): supports text selection

tests/ui/modules/Linphone/Chat/Chat.qml

@@ -162,7 +162,7 @@ ColumnLayout {
 
     // TMP
     model: ListModel {
-      ListElement { $dateSection: 1465389121000; $outgoing: true; $timestamp: 1465389121000; $type: 'message'; $content: "<img src='http://html.com/wp-content/uploads/html-com-1.png' width='50%' height='50%' />www.google.fr" }
+      ListElement { $dateSection: 1465389121000; $outgoing: true; $timestamp: 1465389121000; $type: 'message'; $content: "https://cdn.pixabay.com/photo/2014/03/29/09/17/cat-300572_960_720.jpg <img src='http://html.com/wp-content/uploads/html-com-1.png' width='50%' height='50%' />www.google.fr" }
       ListElement { $dateSection: 1465389121000; $outgoing: true; $timestamp: 1465389121000; $type: 'message'; $content: "<a href='mailto:qq1@qqpart.com'>Contact mail</a>" }
       ListElement { $dateSection: 1465389121000; $timestamp: 1465389133000; $type: 'event'; $content: 'incoming_call' }
       ListElement { $dateSection: 1465389121000; $timestamp: 1465389439000; $type: 'message'; $content: 'www.test.fr<blink>Perfect!</blink> bg  g vg gv v g v hgv gv gv   jhb jh b  jb jh hg vg    cfcy f  v u  uyg   f tf tf  ft f tf t  t  fy ft f tu  ty f  rd rd  d d   uu gu y  gg y f  r dr   ' }

tests/ui/modules/Linphone/Chat/Message.qml

@@ -29,7 +29,7 @@ Item {
     ) + text.padding * 2
   }
 
-  Text {
+  TextEdit {
     id: text
 
     anchors {
@@ -37,12 +37,11 @@ Item {
       right: container.right
     }
     padding: ChatStyle.entry.message.padding
+    readOnly: true
+    selectByMouse: true
     text: Utils.encodeUrisToQmlFormat($content)
     wrapMode: Text.Wrap
 
-    // Little fix. Text may disappear with scrolling.
-    renderType: Text.NativeRendering
-
     // See http://doc.qt.io/qt-5/qml-qtquick-text.html#textFormat-prop
     // and http://doc.qt.io/qt-5/richtext-html-subset.html
     textFormat: Text.RichText