Begin of the insertion**s**End of the insertion Begin of the deletion **As**End of the deletion an administrator

**I want to** activate and deactivate a custom field for multiple projects in one step (in one view)

**so that** I don't have to go to each project to activate and deactivate a custom field.

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**Acceptance criteria**

* Begin of the insertionThereEnd of the insertion Begin of the deletion In the administration itEnd of the deletion is Begin of the deletion possible to see in which projectsEnd of the deletion a Begin of the insertionnew tab "Projects" in the following views:End of the insertion Begin of the deletion custom field is activatedEnd of the deletion
* Begin of the insertionAdministration -> Project Attributes -> _<Project attribute A>_
* Administration ->End of the insertion Custom fields Begin of the insertion-> WorkEnd of the insertion Begin of the deletion for workEnd of the deletion packages Begin of the insertion-> _<Custom field A>_End of the insertion
* Begin of the insertionAdministration -> Work packages -> Type -> _<Type A>_
* Project attributes
* In the tab "Projects" allEnd of the insertion Begin of the deletion Custom fields forEnd of the deletion projects Begin of the insertionare listed where the custom field/project attribute is activated.End of the insertion
* Begin of the insertionThe list is similar to the existing project list. 
* Parent projects which are not active are not shown. This is the similar approach like we do in the project list when a user is not allowed to see all projects.
* ForEnd of the insertion Begin of the deletion I can activate and deactivateEnd of the deletion each Begin of the insertionactive project there is an action which allows to deactivate the project, e.g. a button or a checkbox - whatever is easy to implement and complies with Primer.End of the insertion
* Begin of the insertionAbove the list thereEnd of the insertion Begin of the deletion ThereEnd of the deletion is a Begin of the insertionbutton "select projects".
* It opens a menu similar to the "include projects".End of the insertion Begin of the deletion helperEnd of the deletion
* Begin of the insertionFilter: All projects | Only selectedEnd of the insertion Begin of the deletion Select allEnd of the deletion
* Begin of the insertionPrimary button: Apply
End of the insertion Begin of the deletion Deselect all
End of the deletion * Begin of the insertionSecondary button: Clear selection
* Checkbox: Include all sub projects

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/57134/content"></div><figcaption class="op-uc-figure--description">Additional tab to selectEnd of the insertion Begin of the deletion We base everything onEnd of the deletion the Begin of the insertionprojects</figcaption></figure>End of the insertion Begin of the deletion code and pattern from the Type AdministrationEnd of the deletion

Begin of the insertion<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/92062/content"></div><figcaption class="op-uc-figure--description">Project selection modal (similar to &amp;amp;quot;Include projects&amp;amp;quot;)</figcaption></figure>End of the insertion Begin of the deletion <img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/57134/content">End of the deletion