Usablity:

In text editor, the CTRL+F find now opens property region (or keeps it) and
activates the search button for input.

That's already nice! But next step should be to do a search on exit of 
the button (or while typing). That's stuff I need Campbell to help with though.

Notes:
- Probably Py api for property buttons could get an "operator=" arg?
- The warning menu "not found" should go away
- I also suggest to make "wrap" search default for new editors

source/blender/editors/include/UI_interface.h

@@ -643,6 +643,8 @@ void    uiBlockSetDrawExtraFunc(uiBlock *block,
                                 void (*func)(const struct bContext *C, void *, void *, void *, struct rcti *rect),
                                 void *arg1, void *arg2);
 
+void UI_textbutton_activate_event(const struct bContext *C, struct ARegion *ar, void *basepoin, const char *identifier);
+
 void uiButSetFocusOnEnter(struct wmWindow *win, uiBut *but);
 
 /* Autocomplete