* EditPull: add option to change base

Close #11552

* Fix data race in testlogger

* Update git_helper_for_declarative_test.go

* move change issue title from models to issue service package

* make the change less

* fix typo

* move sdk structs to moduels/structs

* fix tests

* fix fmt

* fix swagger

* fix vendor

* prevent pull request to be merged when PR is a WIP

* add tests

* add helper to prepend WIP: in PR title

* move default wip prefixes into settings

* use configurable WIP prefixes in javascript and default to first one in templates

* add documentation

* add unit test on pull model

Signed-off-by: Julien Tant <julien@craftyx.fr>

* Helper functions for intergration test boilerplate