[Kst] missing comboboxselection.h?

[Ted Kisner]

perhaps this file dropped through the cracks during the source file 
rearranging (which is *much* saner by the way- thanks):

------- snip ------------
In file included from scalarselector.h:17,
                 from kstwidgets.cpp:26:
comboboxselection_i.h:21:31: error: comboboxselection.h: No such file or 
directory
comboboxselection_i.h:23: error: expected class-name before '{' token
comboboxselection_i.h:27: error: 'WFlags' has not been declared
------- snip ------------

This is on a fresh checkout.

-Ted