make elm config all stored in blobs ion properties (as well as disk)

make elm config all stored in blobs ion properties (as well as disk)
only not multiple properties and fix up elm config tool so it works
well with the better scheme. all internal changes so nothing app-wise
is affected except for also exposing an event to tell you config was
changed

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@64178 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33