Only insert a link to a component to a key frame. - To check if it is a key frame, now, before inserting a link to a component. - When it is not in a key frame, it is supposed to be a "dup" group. We should not make a link there.

if X_BACKEND
SUBDIRS = calculator tank drag
if SH_TEXT
SUBDIRS += svg2code_ex dynamic menu
endif
endif