Make systray resizable and allow for a larger size.

applets/systemtray/package/contents/ui/ExpandedRepresentation.qml

@@ -25,12 +25,12 @@ Item {
     width: defaultWidth
     Layout.minimumWidth: defaultWidth
     Layout.preferredWidth: defaultWidth
-    Layout.maximumWidth: defaultWidth
+    Layout.maximumWidth: defaultWidth*2
 
     height: defaultHeight
     Layout.minimumHeight: defaultHeight
     Layout.preferredHeight: defaultHeight
-    Layout.maximumHeight: defaultHeight
+    Layout.maximumHeight: defaultHeight*2
 
     property alias hiddenLayout: hiddenItemsView.layout
     property alias plasmoidContainer: container

applets/systemtray/package/contents/ui/main.qml

@@ -227,6 +227,7 @@ MouseArea {
         location: Plasmoid.location
         hideOnWindowDeactivate: !Plasmoid.configuration.pin
         visible: systemTrayState.expanded
+        resizable: true
         backgroundHints: (Plasmoid.containmentDisplayHints & PlasmaCore.Types.DesktopFullyCovered) ? PlasmaCore.Dialog.SolidBackground : PlasmaCore.Dialog.StandardBackground
 
         onVisibleChanged: {