Prepare 4.9.0 release

Update snapshot for unit test of RoleDropdown

Prepare v4.8.0 release

Prepare v4.8.0 release

Prepare 4.7.0 release

Prepare 4.6.1 bugfix release

Update 4.6.0 changelog items date

Prepare 4.6.0

Return only first system action as fallback instead of full list

The function that triggers the default action expects to receive only
one action, not a list.

Prepare 4.5.0 release