* Fields: Break long lines in combo dropdown instead of ellipsis
Longer translations keys are not readable with ellipsis and the tooltip only shows the description (or fallback), not the title.
This change makes long use line breaks with small line height to make the whole text visible.
* Fields: Use table styles for rows to maximize available space
The flex box solution gave a lot of space to the label. This solution minimizes that space to give more space to the values dropdown.
because the common tag vs. left/right tag situation can be different for different entities in the multiselection, the approach to merge/split/update the tags needs to be made on a per entity basis
this introduces a new way to specify tag changes: a callback function which is called for each to be modified entity
