rename status variables to tiddlerStatus and bagStatus

using the irrefutable logic of: if my editor colors the
variable name as a keyword, then I shouldn't use this as
a variable name.
some jslint cleanups to a recently bugfixed tiddlywiki plugin

This certainly doesn't get all the issues, but tidies things
up a bit. Due to TiddlyWiki's use of lots of globals it's never
gonna be complete.

We should probably do this on most of the plugins. If we had the
problem that was fixed by 2f6413b73d76a529c15b22cc666bcc41491af39e
would have been found by linting.