Classic confinement request for Maestral

@sschott - consider it withdrawn.

@sschott and @LyzardKing - I suggest bringing the appindicators issue up in the ‘snapcraft’ category so others skilled in this area can comment and/or suggest improvements for the situation.

Done already here: Qt5 appindicators not showing in gnome shell - #2 by LyzardKing I was just hoping you could point us in the right direction :wink: