Cannot reduce the width of "Properties" section beyond certain threshold

In recent versions of MKVToolnix, the minimum width of the "Properties" section has increased, or something is preventing the width of that particular section from being reduced beyond a certain point, despite the fact that there is seemingly a lot of unused space left on the right side of the section (highlighted in red).

I tested a few older builds. In v50.0, the minimum width was certainly much shorter in light mode and there was no unused space on the right side of the section:

In the same version, as soon as I switch to dark mode, the minimum width of the section increases and a horizontal scrollbar is introduced, and the width of that section cannot be reduced any further:

In latest v78 and the most recent versions before that (at the least), the behavior is the same as v50 in Dark Mode, regardless of whether Light Mode is used or Dark Mode:

It seems the long strings under Audio Properties > Emphasis might be preventing the width of the Properties section from being reduced any further. However, this option did not exist at all in v50, while v50 had the same problem in Dark Mode.

Assuming that that particular option is the culprit, maybe the strings can be refactored and shortened, or maybe the empty space between the word "Emphasis" and the drop down menu could be reduced, to reduce the minimum width of the Properties version.