### Steps to reproduce

1. Configure a custom logo and mobile logo for your OpenProject instance

2. Log in to the mobile app


### What is the buggy behavior?

* On authorisation screen, the nice custom logos are not visible on typical mobile resolutions.

* The mobile logo is used on the smaller resolutions at all


Rough width of typical mobile resolution:

<img class="image_resized op-uc-image op-uc-image_inline" style="width:274px;" src="/api/v3/attachments/919187/content"> Begin of the deletion

End of the deletion <img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/919212/content">

Widest resolution without any logo:

<img class="image_resized op-uc-image op-uc-image_inline" style="width:600px;" src="/api/v3/attachments/919188/content">

Narrowest resolution with a logo (not the mobile logo):

<img class="image_resized op-uc-image op-uc-image_inline" style="width:602px;" src="/api/v3/attachments/919189/content">

### What is the expected behavior?

Begin of the insertionCustom logos are rendered on all realistic resolutions.

End of the insertion Begin of the deletion * Instead of using a custom layout, these pages follow the same header structure as the rest of the application


End of the deletion ###

### Environment information

**OpenProject version**

dev branch (between 17.1 and 17.2)

community 17.1

**Browser**

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

**Operating System**

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