Include wx/app.h according to precompiled headers of wx/wx.h (with other minor cleaning).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38945 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/utilsx11.cpp

@@ -18,6 +18,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/log.h"
+    #include "wx/app.h"
 #endif
 
 #include "wx/iconbndl.h"
@@ -774,8 +775,6 @@ KeySym wxCharCodeWXToX(int id)
 // check current state of a key
 // ----------------------------------------------------------------------------
 
-#include "wx/app.h"
-
 bool wxGetKeyState(wxKeyCode key)
 {
     wxASSERT_MSG(key != WXK_LBUTTON && key != WXK_RBUTTON && key !=