JetBrains: Make it compatible with 2022.2
Created by: vdavid
Fixes https://github.com/sourcegraph/sourcegraph/issues/39571
- Updated platform+Java+IntelliJ versions
- Fixed the theme bug: apparently, JetBrains started using a new color class
- Bumped plugin version to 2.0.0, to go ahead with the release
Test plan
Tested it, it looks nice again. When changing the theme, the “panda bug” reappears, but it's not directly related to this bug. I've created a separate issue for this, with priority:high, but in the Icebox: https://github.com/sourcegraph/sourcegraph/issues/39574
App preview:
Check out the client app preview documentation to learn more.