refactor: update grid border radius, sort indicators and outline base styles

[jouni]

• Use smaller border radius by default
• Add hover styles and secondary color to sort indicators
• Fix focus outline issues (was visible when reordering columns and when pressing e.g. Shift after clicking on a cell)

I checked all updated screenshots, and the only changes are the host border radius and sort indicator colors.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jouni]

Hmm, now I wonder why CRUD screenshots were not failing, as I forgot to update them 🤔

[jouni]

I’ll do another PR just to update those.