Refactor: Extract similar logic in IssuesHelper#show_detail to a new method.
Added unit tests for IssuesHelper#show_detail
Moves scm adapters unit tests to a dedicated folder.
Makes test pass with Bazaar 2.1.0 (#5002).
Moves ProjectsController#add_issue_category to IssueCategoriesController#new.
Moves ProjectsController#add_version to VersionsController#new.
Adds context menu to the roadmap issue lists.
Remove double negative condition
Refactor: Moved the contents of #issue_update into Issue.
Unselect issues when clicking outside of the list.
