Add global profile selector to the custom print setup panel

Also modify some styles to adjust to the designs.

Contributes to CURA-5941.

resources/qml/PrintSetupSelector/Custom/CustomPrintSetup.qml

@@ -4,6 +4,7 @@
 import QtQuick 2.7
 import QtQuick.Controls 2.0
 
+import UM 1.3 as UM
 import Cura 1.0 as Cura
 
 
@@ -14,8 +15,34 @@ Item
     // TODO: Hardcoded now but UX has to decide about the height of this item
     height: 500
 
+    property real padding: UM.Theme.getSize("default_margin").width
+
+    // Profile selector row
+    GlobalProfileSelector
+    {
+        id: globalProfileRow
+        anchors
+        {
+            top: parent.top
+            topMargin: parent.padding
+            left: parent.left
+            leftMargin: parent.padding
+            right: parent.right
+            rightMargin: parent.padding
+        }
+    }
+
     Cura.SettingView
     {
-        anchors.fill: parent
+        anchors
+        {
+            top: globalProfileRow.bottom
+            topMargin: UM.Theme.getSize("default_margin").height
+            left: parent.left
+            leftMargin: parent.padding
+            right: parent.right
+            rightMargin: parent.padding
+            bottom: parent.bottom
+        }
     }
 }