### Steps to reproduce

1. Go to Administration > Design > Default colours


### What is the buggy behaviour?

* No way to know what this Begin of the insertionpageEnd of the insertion Begin of the deletion pagesEnd of the deletion is doing


### What is the expected behaviour?

1. Add caption, TBD Parimal


###

### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/924572/content">

### Environment information

**OpenProject version**

Core build

[2598787b7c701198249e8ccfd8765f012bb2b6ec](https://qa.openproject-edge.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fopenproject%2Fcommit%2F2598787b7c701198249e8ccfd8765f012bb2b6ec)

Product version

[23d50151be5bb3e611ff74a5f23ab06e187340d0](https://qa.openproject-edge.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fsaas-openproject%2Fcommit%2F23d50151be5bb3e611ff74a5f23ab06e187340d0)

Core version

OpenProject 17.9.0

**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)