FIX #58 on page duplicate

Fixing issue #58 where WidgetAreas end up being linked to multiple pages at once
BUG Fixed issue with nested InheritSideBar not inheriting beyond the first level
Fixed locale for AJAX requests on addWidget.

Currently locale is ignored with AJAX add requests, this patch sends the form locale with the request.
Merge pull request #66 from tractorcow/inherit-sidebar-fix

BUG Fixed issue with nested InheritSideBar not inheriting beyond the first level
Merge pull request #59 from Mark-M/patch-1

FIX #58 on page duplicate
Merge pull request #67 from Sixfifty/patch-1

Fixed locale for AJAX requests on addWidget.
Updated master strings