fix: Specify min width for selection cell

[enjeck]

Simple fix to avoid excessive jumping when inline editing.

Before

Bildschirmaufzeichnung.vom.2025-11-13.15-57-10.webm

After

Screen.Recording.2025-12-03.at.05.38.31.mov

[juliusknorr]

A few remarks:

• We have two "jumps" in the layout there, where i think one could be solved a bit more elegant
• The first happens when the plain rendering switches to the multiselect
  • Could we also give the non-edit rendering some padding so that ideally the text is staying in position
  • Enough padding to reserve space for the multiselect could already help for the first problem jumping
• The second happens when the multiselect is selected, i have not found the css rule that influences that on a quick check, but as soon as the focus is there the select has a .vs--open class which then leads to the label not taking up available space anymore