notifications: allow tags to be passed in, instead of always setting as ["sync"]
* don't restrict removeAll() to just the sync tags

(integrated from komodo (trunk) change 81441 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13454 b87d16e7-d29f-4ee1-b5ec-817d645d335f