BUG #14218. Fixes color preset issues.

The color preset dialog showed up with the first item active. As a result when
the user clicked on it, it wouldn't realize that the user selected and it and
hence would never change to that item causing the reported bug. We fix it by
using the selection-changed signal rather than the current-changed to catch this
case.

Change-Id: I1e99fc25cfc8095bef80afdf888dcf36b7d6b846
Merge topic '0014218_fix_color_preset_issues' into next

62c9bbd BUG #14218. Fixes color preset issues.