Merge in the old ColorDialog which was a placeholder for
color_filter_add_cb.
Change-Id: I48d188509f480b8514122b4011ac9d8790fcca10
Reviewed-on: https://code.wireshark.org/review/6996
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>