(In reply to Jakub Steiner from comment #0)
> 'rt' in looking glass no longer reloads the theme, since it was moved to the
> gresource. Either we should have this working or remove the functionality.

Please don't remove. It is extremely useful when developing themes. :/

Making it work is probably the better alternative as reloading shell no longer works in a Wayland session.

Created attachment 313820 [details] [review]
runDialog: Reload resource on 'rt'

Moving the default theme to a resource broke the 'rt' command;
reload the resource before the theme to fix it.

Review of attachment 313820 [details] [review]:

lgtm

Attachment 313820 [details] pushed as 0b9e68e - runDialog: Reload resource on 'rt'

It doesn't belong here, but since you mentioned Shell Restart. 
Because "r" isn't working on Wayland, it is not possible to unload extensions without logging off.

Will "r" work at some point on Wayland?

(In reply to alex diavatis from comment #6) 
> Because "r" isn't working on Wayland

It's not that it's not working, it has been disabled on purpose. That's because when using wayland, the shell is the display server, and apps don't generally deal with the display server going away - in other words, restarting the shell under wayland has the side effect of all windows going away, see bug 741665.
So no, while we cannot expect apps to deal with a restart of the display server, "r" will remain disabled.