Enforce loading of main component from settings

Change-Id: I9b38d12a6aa0737eeb5f3292dc2463a044952eb9

qml/main.qml

@@ -72,7 +72,6 @@ Window {
         Loader {
             id: loader
             anchors.fill: parent
-            source: "basic/Basic.qml"
         }
     }