fix: qml warnings

ui/app/AppLayouts/Chat/ChatColumn/TopBar.qml

@@ -52,6 +52,7 @@ Rectangle {
                     let cnt = chatsModel.activeChannel.members.rowCount();
                     if(cnt > 1) return qsTr("%1 members").arg(cnt);
                     return qsTr("1 member");
+                default: return "...";
             }
         }
         font.pixelSize: 12

ui/app/AppLayouts/Chat/components/ChannelIcon.qml

@@ -12,8 +12,8 @@ Rectangle {
   property int channelType
   property string channelIdenticon
   id: contactImage
-  width: width ? width : 36
-  height: height ? height: 36
+  width: 36
+  height: 36
   anchors.left: parent.left
   anchors.leftMargin: Theme.padding
   anchors.top: parent.top