fix #995 by disabling backstage sync
fix #995 by disabling backstage sync

This is less a fix and more a papering over the error with
some helpful information. It's likely that some solution
like
https://github.com/TiddlySpace/tiddlyspace/issues/995#issuecomment-10052683
will need to be built, but in the meantime we need to get rid of the
error. Fixing sync will be added to the forthcoming roadmap.

TiddlySpace/tiddlyspace,TiddlySpace/tiddlyspace,TiddlySpace/tiddlyspace