[Bf-taskforce25] Restoring paint cursors

[Nicholas Bishop]

There's a minor bug with all the modes that use a paint cursor: the
cursor isn't restored after reloading a file. It seems like it should
be an easy fix, but I can't figure out where the cursor should be
reloaded. It can't happen in the actual sculpt/paint code, because
that code doesn't run until the user actually clicks somewhere. Any
thoughts?

-Nicholas