This reverts commit 31a8a99440.
This was meant for bgo#695885 which has stalled for a while, so this
feature has no in-tree user. This commit removes it for now, this can be
readded when users for it materialize.
https://bugzilla.gnome.org/show_bug.cgi?id=751597
Add a class method to CcPanel to get a GOptionGroup which will be added
to the main commandline parser. This gives panels the chance to have
commandline "--flags" in addition to the already available parameters.
This changes changes the way parameters are passed to panels: the first
entry in the GVariant array is always the a{sv} dictionary of
commandline flags, followed by the remaining free-form arguments.
https://bugzilla.gnome.org/show_bug.cgi?id=696054
By using a GVariant of type "av" we can potentially pass more structured
data to panels, which will become relevant with the ability to invoke
them by GAction-based DBus-activation introduced in the following patch.
https://bugzilla.gnome.org/show_bug.cgi?id=696054
Now that we don't allow or load external panels, using libgnome-menu is just
overengineering. We can get the same results with less code by keeping a static
list of function pointers.
This reduces the number of places one needs to patch to add a new panel.
Also, this way we avoid registering all types at startup, and if we want
we can switch to load panel desktop files in a separate thread.
https://bugzilla.gnome.org/show_bug.cgi?id=690165
