Fixed mouse closing containers, and injection/gui test order

Called setEnabled on channels now effects whether those channels
notify listeners, rather than whether they register changes to
their controls. This was making channels get stuck on "1" when the
GUI was activated.

Also ensured GUI activity can invalidate player controls even if
that activity is closing the GUI, by re-ordering a check.

And fixed a comment.

apps/openmw/mwinput/inputmanagerimp.cpp

@@ -569,10 +569,10 @@ namespace MWInput
     {
         bool guiMode = false;
 
-        if (id == SDL_BUTTON_LEFT || id == SDL_BUTTON_RIGHT) // MyGUI has no use for these events
+        if (id == SDL_BUTTON_LEFT || id == SDL_BUTTON_RIGHT) // MyGUI only uses these mouse events
         {
-            MyGUI::InputManager::getInstance().injectMousePress(mMouseX, mMouseY, sdlButtonToMyGUI(id));
-            guiMode = guiMode && MWBase::Environment::get().getWindowManager()->isGuiMode();
+            guiMode = MWBase::Environment::get().getWindowManager()->isGuiMode();
+            guiMode = MyGUI::InputManager::getInstance().injectMousePress(mMouseX, mMouseY, sdlButtonToMyGUI(id)) && guiMode;
             if (MyGUI::InputManager::getInstance ().getMouseFocusWidget () != 0)
             {
                 MyGUI::Button* b = MyGUI::InputManager::getInstance ().getMouseFocusWidget ()->castType<MyGUI::Button>(false);
@@ -596,8 +596,8 @@ namespace MWInput
         {
             mInputBinder->mouseReleased (arg, id);
         } else {
-            bool guiMode = MyGUI::InputManager::getInstance().injectMouseRelease(mMouseX, mMouseY, sdlButtonToMyGUI(id));
-            guiMode = guiMode && MWBase::Environment::get().getWindowManager()->isGuiMode();
+            bool guiMode = MWBase::Environment::get().getWindowManager()->isGuiMode();
+            guiMode = MyGUI::InputManager::getInstance().injectMouseRelease(mMouseX, mMouseY, sdlButtonToMyGUI(id)) && guiMode;
 
             if(mInputBinder->detectingBindingState()) return; // don't allow same mouseup to bind as initiated bind
 

extern/oics/ICSChannel.cpp

@@ -84,7 +84,7 @@ namespace ICS
     
         mValue = value;
 
-        if(previousValue != value)
+        if(previousValue != value && mEnabled)
         {
             notifyListeners(previousValue);
         }
@@ -130,9 +130,6 @@ namespace ICS
 
 	void Channel::update()
 	{
-        if(!mEnabled)
-            return;
-
         if(this->getControlsCount() == 1)
 		{
 			ControlChannelBinderItem ccBinderItem = mAttachedControls.back();