Remove all trailing spaces

No real changes, just clean up sources by removing trailing spaces from
all the non-generated files.

This should hopefully avoid future commits mixing significant changes
with insignificant whitespace ones.

include/wx/qt/minifram.h

@@ -25,7 +25,7 @@ public:
               const wxString& name = wxFrameNameStr)
   {
       return wxFrame::Create(parent, id, title, pos, size,
-                             style | wxFRAME_TOOL_WINDOW | wxFRAME_NO_TASKBAR, 
+                             style | wxFRAME_TOOL_WINDOW | wxFRAME_NO_TASKBAR,
                              name);
   }