### Steps to reproduce

1. Login as a user with permissions to edit cost reports

2. Go to Time & Costs

3. Create a new report or edit an existing one by adding a filter and click 'Apply'


### What is the buggy behavior?

* Loading spinner is unreadable


### What is the expected behavior?

1. New loading spinner is used Begin of the insertion([Primer Spinner](https://primer.style/product/components/spinner/))End of the insertion Begin of the deletion (the one with the green square)End of the deletion


### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/209637/content">

### Environment information

**OpenProject version**

_14.6.0_

**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)