Improve support for cached role queries
Start entity tagging support
Add WYSIGYG editor and media browser support

Currently TinyMCE and elFinder are supported
Introduce config for form object
Remove import of _MOM.Id_Entity_has_Tag

Should be done by the application or by an essential class when tag
support is actually needed.
Remove another `test` inadvertantly added
Avoid creation of test databases named `test`
Query attribute support enhanced

Move creation of query attributes into the `finalize` method (required if
query attributes of roles of an association access cached roles)
Add support for removing objects during lifting
Add elFinder driver for galleries
Add tests for `Q.person` passed to `Account.query`
Fix setting of `db_name` in `_main`