Don't allow anonymous users to edit public layers
remove tests about public layers editing
Check user is at least authenticated before initiating the editing actions
Update editing doc
Update changelog

Fix public layers editing entry
RestrictionArea not desable on public layers

To be able to link a public layer to a restriction area for the
editing.

See: https://github.com/camptocamp/c2cgeoportal/pull/703
Don't be able to link a restriction area to a non internal WMS layer
Change exception type
Remove duplicate 'pragma: no cover'
Layers view support None RestrictionArea.area.
Merge pull request #703 from camptocamp/public-layers-editing

Don't allow anonymous users to edit public layers