[apps/graph] When possible, call the method to init the cursor position

directly in graph window methods

Change-Id: Icd9c29657a11e3a76cfc2e1232221b7428794019

apps/graph/graph/initialisation_parameter_controller.cpp

@@ -53,7 +53,6 @@ bool InitialisationParameterController::handleEvent(Ion::Events::Event event) {
       default:
         return false;
     }
-    m_graphWindow->initCursorPosition();
     StackViewController * stack = (StackViewController *)parentResponder();
     stack->pop();
     return true;