Improve webservice prioritisation.

Ctrl-F5 Refresh - Priority/Important
Redirect - Priority/Important
Saves/submissions - Priority/Not-Important
Everything else - Normal
Tweak when we prioritise and don't cache
Space moved

As per bitmap's review comments, I have relocated the errant space from
one file to the other.

Damn pesky spaces - always sneaking off and repositioning themselves
where you don't want 'em.
Address Fresno comment

Put important back to True so that this is LIFO on the priority queue.