Fixed size of expandableItem not being the correct width

CURA-5785

resources/qml/ExpandableComponent.qml

@@ -111,7 +111,7 @@ Item
         // Make the popup right aligned with the rest. The 3x padding is due to left, right and padding between
         //the button & text.
         x: -width + collapseButton.width + headerItemLoader.width + 3 * background.padding
-
+        padding: UM.Theme.getSize("default_margin").width
         closePolicy: Popup.CloseOnPressOutsideParent
 
         background: Rectangle

resources/qml/Menus/ConfigurationMenu/QuickConfigurationSelector.qml

@@ -92,7 +92,7 @@ Cura.ExpandableComponent
 
     popupItem: Item
     {
-        width: base.width
+        width: base.width - 2 * UM.Theme.getSize("default_margin").width
         height: 200
 
         TabBar