[BUG] Multi-View: Buttons for image editing are not positioned sensibly

[markusweigelt]

Description

The more music sheets are added, the more editing buttons appear in the upper area of the MultiView. When adjusting the contrast of a msuic sheet image, the correct button has to be found by trial and error or counting. Additionally, scrolling up and down becomes more difficult when there are more than four sheets, making it harder to locate the right button.

Reproduction

Steps to reproduce the behaviour:

1. Navigate to
   https://example.com/viewer?tx_dlf%5Baction%5D=main&tx_dlf%5Bcontroller%5D=PageView&tx_dlf%5BdocPage%5D%5B1%5D=5&tx_dlf%5BdocPage%5D%5B2%5D=9&tx_dlf%5BdocPage%5D%5B3%5D=13&tx_dlf%5BdocPage%5D%5B4%5D=15&tx_dlf%5Bdouble%5D=0&tx_dlf%5Bid%5D=https%3A%2F%2Ftest.dfg-viewer.de%2Ffileadmin%2Fcomposition%2FMus.2389-N-9.xml&tx_dlf%5Bmultiview%5D=1&tx_dlf%5Bpage%5D=1&cHash=519b78c80be30d359759090f71db9599

Expected Behavior

The edit button should be displayed in the respective grid element of music sheet.

Screenshots and Examples

Environment

• TYPO3 version: [e.g. 11.5.41]

[sebastian-meyer]

Anything design-related should be post-poned until all bugs are fixed.