Reset screen faders in clear()

Fixes a black screen when loading a game while waiting/resting.

apps/openmw/mwgui/screenfader.cpp

@@ -119,6 +119,12 @@ namespace MWGui
         queue(time, percent/100.f);
     }
 
+    void ScreenFader::clear()
+    {
+        clearQueue();
+        notifyAlphaChanged(0.f);
+    }
+
     void ScreenFader::setFactor(float factor)
     {
         mFactor = factor;

apps/openmw/mwgui/screenfader.hpp

@@ -42,6 +42,8 @@ namespace MWGui
         void fadeOut(const float time);
         void fadeTo(const int percent, const float time);
 
+        void clear();
+
         void setFactor (float factor);
         void setRepeat(bool repeat);
 

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -1589,8 +1589,6 @@ namespace MWGui
 
         mForceHidden = GW_None;
 
-        setWerewolfOverlay(false);
-
         while (!mGuiModes.empty())
             popGuiMode();