[apps] Event 'right' on chevron cells behaves as OK and 'left' on the

next cell as 'back'

Change-Id: I2470659d8237373b21ad106c79cc5f8945f0edb5

apps/shared/interval_parameter_controller.cpp

@@ -63,6 +63,14 @@ HighlightCell * IntervalParameterController::reusableParameterCell(int index, in
   return m_intervalCells[index];
 }
 
+bool IntervalParameterController::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::Left && stackController()->depth() > 2) {
+    stackController()->pop();
+    return true;
+  }
+  return false;
+}
+
 int IntervalParameterController::reusableParameterCellCount(int type) {
   return k_totalNumberOfCell;
 }