JetBrains: Change shortcuts

Created by: vdavid

Fixes https://github.com/sourcegraph/sourcegraph/issues/37998

Set the “Open popup” shortcut to ⌥S (Alt + S) (as in Sourcegraph). Remove the rest of the shortcuts.

Test plan

The context menu looks like this:

✅ The popup opens when I press Option+S.

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.