Set System Tray AppletItem width properly

Summary:
Width should not include top and bottom margins

BUG: 364543
FIXED-IN: 5.7

Reviewers: #plasma

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D1966

applets/systemtray/package/contents/ui/items/AbstractItem.qml

@@ -24,9 +24,10 @@ import org.kde.plasma.components 2.0 as PlasmaComponents
 PlasmaCore.ToolTipArea {
     id: abstractItem
 
-    height: hidden ? root.hiddenItemSize + marginHints.top + marginHints.bottom : root.itemSize + marginHints.top + marginHints.bottom
-    width: labelVisible ? parent.width : height + marginHints.left + marginHints.right
+    height: effectiveItemSize + marginHints.top + marginHints.bottom
+    width: labelVisible ? parent.width : effectiveItemSize + marginHints.left + marginHints.right
 
+    property real effectiveItemSize: hidden ? root.hiddenItemSize : root.itemSize
     property string itemId
     property string category
     property alias text: label.text