Fix XSS Bug, Issue #563

Set the form action to be "/" so that non-escaped text is not present in
the action param.  Issue #563
Merge pull request #595 from treyhendon/bug-lp3-563-xssFixOn404

Fix XSS Bug, Issue #563
- added help text for the Route field of the Page Propertes
Merge remote-tracking branch 'upstream/develop' into develop