Font catalog shouldn't change width while scrolling through it

[DallinYauney]

Scrolling the font selection menu is jittery on latest builds (but not on stable). Seemingly, the font panel always shrinks as much as it can, but some fonts preview rather wide, so scrolling through makes things uneven and hard to read.

Tested on Flatpak and web.

Screencast_20260106_133205.webm

[Keavon]

This is sort of the intended behavior but will likely be more properly fixed in the future so it doesn't act this way.

[mega123-art]

@Keavon may I take this issue
I am a new contributor i would like to try raising pr on this issue

[Keavon]

@mega123-art we do not have any review capacity for web frontend changes so this is not available for contribution. Please feel free to look for issues in the Rust part of our code base, though!