Remove quadruple click message selection

A tripple click is too easily detected as a quadruple when the user
actually did a triple.

src/qml/Base/HSelectableLabel.qml

@@ -96,11 +96,6 @@ TextEdit {
         updateContainerSelectedTexts()
     }
 
-    function selectAllTextPlus() {
-        // Unimplemented by default
-        container.clearSelection()
-    }
-
 
     Connections {
         target: container
@@ -128,7 +123,6 @@ TextEdit {
         onTapped: {
             tapCount == 2 ? selectWordAt(eventPoint.position) :
             tapCount == 3 ? selectAllText() :
-            tapCount == 4 ? selectAllTextPlus() :
             container.clearSelection()
         }
     }