feat: add property for always showing icon button bg

AppIconButton.qml

@@ -13,6 +13,8 @@ Button {
 
     required property string source
     property bool useOriginalColor: false
+    // Shows the highlight background even when not pressed
+    property bool showBackground: false
 
     icon.source: control.source
     icon.width: 20
@@ -24,7 +26,7 @@ Button {
         implicitWidth: 100
         implicitHeight: 40
         visible: !control.flat || control.down || control.checked || control.highlighted
-        color: control.down ? Theme.highlight : "transparent"
+        color: control.down || control.showBackground ? Theme.highlight : "transparent"
         border.width: 0
         // custom
         radius: Theme.radius