Remove global args from editorclass

This removes global arg passing from all functions on editorclass.
Callers have been updated correspondingly. Additionally, all 'dwgfx' has
been replaced with 'graphics' in editor.cpp.

desktop_version/src/main.cpp

@@ -363,11 +363,11 @@ int main(int argc, char *argv[])
             case EDITORMODE:
 				graphics.flipmode = false;
                 //Input
-                editorinput(key, graphics, game, map, obj, help, music);
+                editorinput();
                 //Render
-                editorrender(key, graphics, game, map, obj, help);
+                editorrender();
                 ////Logic
-                editorlogic(key, graphics, game, obj, music, map, help);
+                editorlogic();
                 break;
         #endif
             case TITLEMODE: