frame-drag-and-drop: honor translator's feedback and highlight
frame-drag-and-drop: honor translator's feedback and highlight

Previously when we weren't over the destination presentation we have
always reverted to frame-drag-and-drop-feedback what was
incorrect. Now we use feedback and highlight functions from the
translator which invoked frame-drag-and-drop..

Morever:

- comment on what we do in case of multiple translators of the
same type applying to the presentation (unspecified behavior)
- rename hilite-fn to hilight-fn
- detabify frames.lisp file

slyrus/mcclim,slyrus/mcclim