Merge branch 'refactor-syntax_unicode_button' into refactor-syntax_unicode_setbuffer2
Remove MCParameter::setbuffer method

All calls to this method have been replaced with more modern equivalents.
Change MC{Stack,Field,Card}::find to use a context instead of an EP
Merge branch 'refactor-syntax_unicode' into refactor-syntax_unicode_find
Merge branch 'refactor-syntax_unicode' into refactor-syntax_unicode_setbuffer2

Conflicts:
	engine/src/font.cpp
Merge branch 'refactor-syntax_unicode_button' into refactor-syntax_unicode_setbuffer2
MCInterfaceExecShowObject no longer sets properties via an EP
Merge branch 'refactor-syntax_unicode_setbuffer2' into refactor-syntax_unicode
Merge refactor-syntax_unicode_sort

Conflicts:
     engine/src/util.cpp
Merge branch 'refactor-syntax_unicode_find' into refactor-syntax_unicode
Merge branch 'refactor-syntax_unicode_showobject' into refactor-syntax_unicode

Conflicts:
	engine/src/object.h
	engine/src/objectprops.cpp