graphics optimizations/fixes/features

* cache text vertex for StaticText, AnimatedText and Creature names
* improved outfit rendering
* fully compatible with OpenGL 1.1
* enable mipmaping for game sprites again
* Ctrl+W hotkey clean game texts

src/framework/platform/x11window.cpp

@@ -370,10 +370,10 @@ void X11Window::internalChooseGLVisual()
 #else
         EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT,
 #endif
-        EGL_RED_SIZE, 5,
-        EGL_GREEN_SIZE, 6,
-        EGL_BLUE_SIZE, 5,
-        EGL_ALPHA_SIZE, 0,
+        EGL_RED_SIZE, 4,
+        EGL_GREEN_SIZE, 4,
+        EGL_BLUE_SIZE, 4,
+        EGL_ALPHA_SIZE, 4,
         EGL_NONE
     };