applets/taskmanager: Set task width in GroupDialog

applets/taskmanager/package/contents/ui/GroupDialog.qml

@@ -92,6 +92,7 @@ PlasmaCore.Dialog {
                         restoreMode: Binding.RestoreNone // Store rootIndex to avoid sudden changes in height
                     }
                     delegate: Task {
+                        width: groupListView.width
                         visible: true
                         inPopup: true
 

applets/taskmanager/package/contents/ui/Task.qml

@@ -21,7 +21,6 @@ MouseArea {
 
     activeFocusOnTab: true
 
-    width: groupDialog.contentWidth
     height: Math.max(theme.mSize(theme.defaultFont).height, PlasmaCore.Units.iconSizes.medium) + LayoutManager.verticalMargins()
 
     visible: false