Make the height of the Print setup selector themable.

Contributes to CURA-5772.

plugins/PrepareStage/PrepareMenu.qml

@@ -61,12 +61,12 @@ Item
 
         Cura.CustomConfigurationSelector
         {
-            width: UM.Theme.getSize("sidebar").width
+            width: UM.Theme.getSize("configuration_selector_widget").width
         }
 
         Cura.PrintSetupSelector
         {
-            width: UM.Theme.getSize("sidebar").width
+            width: UM.Theme.getSize("print_setup_widget").width
             onShowTooltip: prepareMenu.showTooltip(item, location, text)
             onHideTooltip: prepareMenu.hideTooltip()
         }

resources/qml/PrintSetupSelector.qml

@@ -189,7 +189,7 @@ Rectangle
         anchors.topMargin: UM.Theme.getSize("sidebar_margin").height
         anchors.left: parent.left
         anchors.right: parent.right
-        height: 500
+        height: UM.Theme.getSize("print_setup_widget").height
 
         // We load both of them at once (instead of using a loader) because the advanced sidebar can take
         // quite some time to load. So in this case we sacrifice memory for speed.

resources/themes/cura-light/theme.json

@@ -355,6 +355,9 @@
 
         "account_button": [12, 3],
 
+        "print_setup_widget": [35.0, 42.0],
+        "configuration_selector_widget": [35.0, 0.0],
+
         "views_selector": [0.0, 4.0],
 
         "default_lining": [0.08, 0.08],