* Fix change detection when .GetPage/site.GetPage is used from shortcode
* Fix stale content for GetPage results with short name lookups on server reloads
Fixes #7623
Fixes #7624
Fixes #7625
This commit also
* revises the change detection for templates used by content files in server mode.
* Adds a Page.RenderString method
Fixes #6545
Fixes #4663
Closes #6043