Focus master item in merge item on linux in dark mode

mjthoraval

On Windows (10), I can clearly identify which master item is selected after triggering a merge action:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/22wvs32dz33vmqhxq0tb.png

But on Ubuntu (25.04), it is highlighted in black, which makes it difficult to identify:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/py9amvq06wzce5591tj4.png

Zotero 7.1-beta.44+057c79820 (64-bit)