v1.5.0-rc2

* SECURITY
  * Check that repositories can only be migrated to own user or organizations (#4366) (#4370)
* BUGFIXES
  * Fix column droping for MSSQL that need new transaction for that (#4440) (#4484)
  * Redirect to correct page after using scratch token (#4458) (#4472)
  * Replace src with raw to fix image paths (#4377) (#4386)
  * Fixes repo membership check in API (#4341) (#4379)
  * Add default merge options when adding new repository (#4369) (#4373)
  * Fix repository last updated time update when delete a user who watched the repo (#4363) (#4371)
  * Fix html entity escaping in branch deletion message (#4471) (#4485)
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