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### Steps to reproduce

_Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

1. Login as an admin

2. Go to "work packages"


### What is the buggy behavior?

 The menu item uses the singular version - Begin of the insertionIdentifier.End of the insertion Begin of the deletion Identifier. End of the deletion

Most of the other menu items use plural forms (types, priorities, workflows, etc)

<br>

* <figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="https://community.openproject.org/api/v3/attachments/921352/content"></div></figure>


### What is the expected behavior?

_Describe how the application should behave like. Example:_

1. The naming should be consistent

2. We should use &quot;Identifiers&quot; both for the left-hand menu, and for the headings on the page Begin of the insertionand the breadcrumbsEnd of the insertion


###

###

### Environment information

<br>

**OpenProject installation type**

* Hosted cloud edition


**OpenProject version**

_17.5.0_

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

* [x] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [ ] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)

**Language**

_EN_