Ugly modal dialogs in TV layout

[dmitrylyzo]

Describe The Bug
In TV layout, buttons on the confirm and alert dialogs are too big.
The button text is not centered.

Steps To Reproduce
Do it on some test media (a copy or read only for Jellyfin). Just to be sure
also you must be logged as admin

1. Set TV layout (and refresh).
2. Go to item.
3. Click More (...).
4. Select Delete media.
5. Look at the "beauty".

Expected Behavior
Buttons should not be stretched.
Maybe they should be not more than 50% of the dialog content.
The button text should be centered.

Screenshots

System (please complete the following information):

• Platform: Linux
• Browser: Chrome, Firefox
• Jellyfin Version: dev (10.8.0)