SDK Manager's appearance clashes with macOS dark mode

Reproduction procedure:

- Install SDK Manager on a Mac set to dark mode

Observations:

- The "delete" and "download"  buttons for the devices are black, as well as the chevrons for expanding/collapsing sections, but the background is dark grey, so they don't look good, although they're still recognizable

- The "new" badge next to new devices is also black, and nearly unreadable on the dark grey background.

Screenshots are attached in the first comment.

Light mode looks fine. Also, dark mode in Windows 11 is fine -- the app's background is light regardless of the system being in dark mode.