Modified num() builtin function to support Date values.
Merge branch 'develop'
Added store() and retrieve() builtin functions for temporary object storage in ActionContext.
Modified schema editor to re-enable support for attributes on the builtin type "File".
Modified websocket UnarchiveCommand to support large archives by adding transaction commit
after 50 files.
Modified SetPermissionCommand and UpdateCommand to support large change sets by adding
transaction commit after 1000 entities.
Reduced modification count for transaction commit from 1000 to 100.
Modified UpdateCommand and PermissionCommand again.
Some performance optimizations in websocket JSON serialization, avoid to send unneccessary data.
Removed limitation of folder contents in ui.