[apps/settings] AboutController::m_view should live inside the Settings

app

This fixes the following bug: AboutController::view was built at first
call of "AboutController::view()" but the Settings can be rebuilt later
and the pointers might have moved (hence the ones used in
AboutController::view constructor which is not rebuilt then)

apps/settings/sub_menu/about_controller.cpp

@@ -5,7 +5,8 @@
 namespace Settings {
 
 AboutController::AboutController(Responder * parentResponder) :
-  GenericSubController(parentResponder)
+  GenericSubController(parentResponder),
+  m_view(&m_selectableTableView)
 {
   for (int i = 0; i < k_totalNumberOfCell; i++) {
     m_cells[i].setMessageFont(KDFont::LargeFont);