ui: Indexing UI

* Added DialogView with QtDialogView implementation to handle information dialogs
* Implemented QtIndexingDialog class that covers all different dialogs for indexing
* Directly communicate with DialogView from Prpject and all Tasks involved in indexing
* Block QtMainWindow UI while indexing

src/lib/utility/scheduling/TaskLambda.cpp

@@ -30,3 +30,7 @@ void TaskLambda::interrupt()
 void TaskLambda::revert()
 {
 }
+
+void TaskLambda::abort()
+{
+}