-esqvfd.cpp: Ignore 'ff' light commands. 'e8' also clears attributes. (#14460) [CBrunschen]

-esqvfd.cpp: Ignore 'ff' light commands. 'e8' also clears attributes.
-esqvfd.cpp: Normalized bracing from a mix to K&R, matching esqvfd.h.
-esqvfd.cpp: Added save_item(...) in device_start() for all member variables. Use existing m_lastchar to ignore the byte following 0xff light commands.
-esqvfd.cpp: Adjusted indentation of the comment at the top of |font| to match the C++ coding guidelines.

Author: cbrunschen