* Pull request options migration and UI in settings
* Add ignore whitespace functionality
* Fix settings if pull requests are disabled
* Fix migration transaction
* Merge with Rebase functionality
* UI changes and related functionality for pull request merging button
* Implement squash functionality
* Fix rebase merging
* Fix pull request merge tests
* Add squash and rebase tests
* Fix API method to reuse default message functions
* Some refactoring and small fixes
* Remove more hardcoded values from tests
* Remove unneeded check from API method
* Fix variable name and comment typo
* Fix reset commit count after PR merge
* Fix so that user can still fork his own repository to his organizations
* Fix to only use owned organizations
* Add integration test for forking own repository to owned organization
* Make branch deletion URL more like GitHub's, fixes #1397
* Add PR branch deletion integration test
* Do not allow deleting protected branch
* Change http error code to 403 if user has no write rights to repository
* Add check to not panic if forked repository has alrady been deleted