**As** a user
**I want to** see the most important relations when pressing the "+ relation" button
**so that** I find quicker what I am looking for

**Acceptance criteria**

* The dropdown which is shown when creating a new relation now uses a second level for navigation

* First level

* Begin of the insertionRelated toEnd of the insertion Begin of the deletion Create new childEnd of the deletion

* Begin of the insertionPredecessor (before)End of the insertion Begin of the deletion Existing childEnd of the deletion

* Begin of the insertionSucessor (after)End of the insertion Begin of the deletion FollowerEnd of the deletion

* Begin of the insertionCreate new childEnd of the insertion Begin of the deletion PredecessorEnd of the deletion

* Begin of the insertionChildEnd of the insertion Begin of the deletion ParentEnd of the deletion

* Begin of the insertionParentEnd of the insertion Begin of the deletion Related toEnd of the deletion

* Begin of the insertion_Other relations_

End of the insertion Begin of the deletion Other relations

End of the deletion * Begin of the insertionDuplicates

End of the insertion Begin of the deletion Second level

End of the deletion * Begin of the insertionDuplicatedEnd of the insertion Begin of the deletion Blocks

* BlockedEnd of the deletion by Begin of the insertion

End of the insertion Begin of the deletion

End of the deletion * Begin of the insertionBlocks

End of the insertion Begin of the deletion Duplicates

End of the deletion * Begin of the insertionBlockedEnd of the insertion Begin of the deletion DuplicatedEnd of the deletion by Begin of the insertion

End of the insertion Begin of the deletion

End of the deletion * Includes Begin of the insertion

End of the insertion Begin of the deletion

End of the deletion * Part of Begin of the insertion

End of the insertion Begin of the deletion

End of the deletion * Begin of the insertionRequires

End of the insertion Begin of the deletion Requirees

End of the deletion * Required by Begin of the insertion


End of the insertion Begin of the deletion


End of the deletion <img Begin of the insertionclass="op-uc-imageEnd of the insertion Begin of the deletion class="image_resized op-uc-imageEnd of the deletion op-uc-image_inline" Begin of the insertionsrc="/api/v3/attachments/694910/content">End of the insertion Begin of the deletion style="width:400px;" src="/api/v3/attachments/638849/content">End of the deletion