Repairing tests and regressions
Consistently use `Security::getCurrentUser()` and `Security::setCurrentUser()`
Fix for the logout handler to properly logout, some minor wording updates
Remove the login hashes for the member when logging out.
BasicAuth to use `HTTPRequest`
* Remove module specific subthemes documentation as it's removed
* Added notes about cascading theme configuration
* Update links to Themes listing to point to addons
* Remove references to tarballs, and put composer publishing instructions in place instead
The 'admin' module will be split off from 'framework',
where 'framework' only provides (mostly) frontend-agnostic PHP classes.
For example, HTMLEditorField.php has a TinyMCEConfig.php driver,
but doesn't come with its own JS includes.
API Introduce HTMLFragment as casting helper for HTMLText with shortcodes disabled
API Introduce DBField::CDATA for XML file value encoding
API RSSFeed now casts from the underlying model rather than by override
API Introduce CustomMethods::getExtraMethodConfig() to allow metadata to be queried
BUG Remove _call hack from VirtualPage
API Remove FormField::$dontEscape
API Introduce HTMLReadonlyField for non-editable readonly HTML
API FormField::Field() now returns string in many cases rather than DBField instance.
API Remove redundant *_val methods from ViewableData
API ViewableData::obj() no longer has a $forceReturnObject parameter as it always returns an object
BUG Fix issue with ViewableData caching incorrect field values after being modified.
API Remove deprecated DB class methods
API Enforce plain text left/right formfield titles
* More pointers to new build tooling docs in upgrading guide
* Fixed docs references to moved files
We don't want to mandate every module to switch from javascript/ to client/src,
but at the same time shouldn't reference non-existant files and confuse newcomers that way.
* More pointers to new React docs
