Move some folders to new More grouping; fix #6330
Move some folders to new More grouping; fix #6330

Some of the less-frequently used special folders have moved into a new
"More" grouping above "Labels".  This keeps down the clutter for people
with lots of accounts.

Squashed commit of the following:

commit 647795e03e8b4d88df0f629b15416ff574fcda4a
Merge: 72515c2 4d2d304
Author: Charles Lindsay <chaz@yorba.org>
Date:   Tue Feb 12 18:13:10 2013 -0800

    Merge branch 'master' into special-subfolders

commit 72515c29ad8e1b1cc0bd653292fc9cf7a8665b27
Author: Charles Lindsay <chaz@yorba.org>
Date:   Tue Feb 12 18:11:17 2013 -0800

    Clean up

commit 8549a5d69b65969fc5d4d515f55f44cb98597b71
Author: Charles Lindsay <chaz@yorba.org>
Date:   Tue Feb 12 12:02:49 2013 -0800

    Add "More" grouping to sidebar

emersion/geary,mpdeimos/geary,martinra/geary,abn/geary,jimbonator/geary,githubnemo/geary,MohamedIM/geary-unofficial,martinra/geary,rschroll/geary,emersion/geary,martinra/geary,robol/geary,jimbonator/geary,AtticHacker/geary,glebihan/geary,AtticHacker/geary,tshikaboom/geary,mjog/geary,glebihan/geary,mjog/geary,kyoushuu/geary,githubnemo/geary,aatishnn/geary,githubnemo/geary,geekvigilante/geary,AtticHacker/geary,tshikaboom/geary,glebihan/geary,robol/geary,jimbonator/geary,aatishnn/geary,aatishnn/geary,rschroll/geary,kpiwko/geary,mjog/geary,emersion/geary,robol/geary,tshikaboom/geary,kyoushuu/geary