* modules/input/gtkimcontextime.h
* modules/input/gtkimcontextmultipress.h
* modules/input/gtkimcontextthai.h
* modules/input/gtkimcontextxim.h: include <gtk/gtk.h> instead of
individual files.
* modules/input/gtkimcontextime.c
* modules/input/gtkimcontextmultipress.c
* modules/input/gtkimcontextxim.c
* modules/input/imam-et.c
* modules/input/imcedilla.c
* modules/input/imcyrillic-translit.c
* modules/input/iminuktitut.c
* modules/input/imipa.c
* modules/input/imti-er.c
* modules/input/imti-et.c
* modules/input/imviqr.c: ditto. Some minor cleanups like moving
"gtk/gtkintl.h" to the end of includes.