Modal dialogs have a horizontal scrollbar even if there's enough room.

[klonos]

More of an annoyance rather than a bug:

I noticed that the "offender" is this css rule. Once removed, the horizontal scrollbar is gone:

So, the question is: (why) do we need this css rule? If not, we could override it in the admin theme, but do we do that for 3rd party external libraries (that is jQuery UI)?

[klonos]

...this is on Firefox by the way (in case this is browser-specific).

I don't recall seeing this lately... Is this still an issue @klonos ?