Change key for debug menu to F10 and for stats to F11

F12 is used by Visual Studio debugger to trigger a breakpoint and apparently it cannot be changed:

"The F12 key is reserved for use by the debugger at all times, so it should not be registered as a hot key. Even when you are not debugging an application, F12 is reserved in case a kernel-mode debugger or a just-in-time debugger is resident."
Source: https://msdn.microsoft.com/en-us/library/windows/desktop/ms646309.aspx?f=255&MSPPError=-2147217396

src/graphics/engine/engine.cpp

@@ -431,7 +431,7 @@ bool CEngine::ProcessEvent(const Event &event)
     {
         auto data = event.GetData<KeyEventData>();
 
-        if (data->key == KEY(F12))
+        if (data->key == KEY(F11))
         {
             m_showStats = !m_showStats;
             return false;

src/level/robotmain.cpp

@@ -779,7 +779,7 @@ bool CRobotMain::ProcessEvent(Event &event)
 
         if (IsPhaseWithWorld(m_phase))
         {
-            if (data->key == KEY(F11))
+            if (data->key == KEY(F10))
             {
                 m_debugMenu->ToggleInterface();
                 return false;

src/ui/debug_menu.h

@@ -39,7 +39,7 @@ class CInterface;
 
 /**
  * \class CDebugMenu
- * \brief Handles debug menu (F11)
+ * \brief Handles debug menu (F10)
  *
  * There should always be only one instance of this class for each associated CRobotMain class.
  */