In GimpAction, instead of connecting the action-history log
function to the action's "activate" signal as a user-provided
handler, call it directly from the default handler.
In subclasses of GimpAction, chain to the parent's activate()
function before emitting the "selected" signal, so that we always
log the action in the history before responding to it.
This allows us to avoid the hack in commit
6544ce4301.
More than 2000 lines of code less in app/, instead of
if (instance->member)
{
g_object_unref/g_free/g_whatever (instance->member);
instance->member = NULL;
}
we now simply use
g_clear_object/pointer (&instance->member);
The code was still checking for "plug-in-recent-*". Also, rename the
actions to "filters-recent-*" instead of "filter-recent-*" for
consistency with the other filters actions.
