This commit was too broad and not cognizant of the purpose of the class
UTF8.
Add MAYBE_VERIFY_UTF8() macro, which can trap non-UTF8 encoded strings in
debug builds.
Use that macro conditionally in class UTF8 to trap non-UTF8 encoded strings
being put into UTF8 instances.
DIALOG_EXCHANGE_MODULE class now has its own header file in the
pcbnew/dialogs directory, and the xchgmod.cpp files was moved along with
it. This has two aims:
* (minor) Standardise the location of "base dialog" derived classes,
like most other dialogs in KiCad.
* (major) Allow inclusion of this dialog class into both legacy-mode
pcbframe.cpp and into GAL tools.
jean-pierre charras
Maciej Suminski
Dick Hollenbeck
Jon Evans
Chris Pavlina
John Beard