"Customize display" cannot be applied after "Update file references"

[andre-hohmann]

Describe the bug
After the file references are updated in the frame "Pagination", it is not possible anymore to apply "Customize display" in the frame Structure data. This allows usually "Show assigned pages", "Show only structure elements", ...

It is necessary to close the metadata and open it again to apply "Customize display".

To Reproduce
Steps to reproduce the behavior:

1. Open the metadata editor with a process with image files
2. Click on "Update file references"
3. Click on "Customize display"
4. See error

Expected behavior
It should be possible to apply all functions of "Customize display".

Screenshots
Position of buttons

Release
KITODO.PRODUCTION Version 3.6.3

Desktop (please complete the following information):

• OS: Windows
• Chrome

Additional context
Add any other context about the problem here.