Remove access application URL field from the metadata input form

In case the access application workflow does not exist yet and is to be
created automatically, there is no way for the user to know it at this point.
If an optional field turns out to be desirable, it can be added later on.
Merge branches 'basic-rems-support' and 'development' of https://github.com/kata-csc/ckanext-kata into development
Merge branch 'development' of https://github.com/kata-csc/ckanext-kata into development
Add checkbox for new access application. Add labels for availabilities.
Merge branch 'development' of https://github.com/kata-csc/ckanext-kata into development