Gnome Shell Unlock is slowed down by Do not Disturb

[goodwillcoding]

@muravjov ... love the extension.

That said I've definately identified as something that takes longer to re-enable which is specifically noticable at screen unlock. With the extension enabled I've seen it add as much as a 1-2 seconds to unlock.

I've been looking over the code but any suggestions are welcome

[goodwillcoding]

My general sense is too much is happening on "enable" that potentially should be moved off to a later stage or signals, but I am not yet sure what it could be