Refactor to use form.restMethod instead of form.permNew|edit=rest. Next step will be to eliminate formMode=FORM_REST

FE.type='annotate': a) always save with encode='none' (upto 30% less size than htmlspecialchar), b) Check fabric data for valid JSON read from database.

First version for save - not working now.
Manual.rst: document config var SYSTEM_DIRTY_RECORD_TIMEOUT_SECONDS.
QuickFormQuery.php, Dirty.php: extend to support QFQ/save().
Client.php: fixed broken PHP Unit test
Config.php: set default for dirtyRecordTimeout.
BuildFormBootstrap.php: No dirtyUrl if dirtyMode=none.
formEditor.sql: extend definition to Form.dirtyMode, new table 'Dirty'
Fixed several unit tests for new tables.

First implementation on server side: only tag as dirty, no check during save().
dirty.php, Dirty.php, Client.php: new
Store.php: refactored fillStoreClient() to use an dedicated class.
BuildFormBootstrap.php: add hook for dirty.php