Fix correct creation of membership associations on project copy
Fix cascade deletion of membership associations on project destroy
Merge pull request #1779 from netfighter/feature/14377_align_copy_project_with_dtag_privacy_guidelines
removes no longer required before filter

The only action requiring the call to assign_planning_elements is the
index action. This action receives it's work packages by calling the
assign_planning_elements method from other methods.
Test subproject copy
Fix subproject copy
Bump version to 3.0.12
Bump version to 3.0.13
Merge pull request #1796 from opf/hotfix/15173_subprojects_are_not_copied_correctly_and_the_hierarchy_is_lost

[Hotfix] 15173 subprojects are not copied correctly and the hierarchy is lost
Merge branch 'release/3.0' into dev

Conflicts:
	app/models/copy_project_job.rb
	lib/open_project/version.rb
	spec/models/copy_project_job_spec.rb
Merge branch 'dev' of github.com:opf/openproject into dev