Fix Visuals of The Selector Component

This PR fixes a bug when Selector component has wrong visuals when selected

Also, this PR fixes visual inconsistencies and bugs in this component.

Please ensure that the following checklist has been satisfied before submitting the PR:

[ ] The documentation has been updated, if necessary.
[ ] Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
[ ] All code follows the Scala, Java, TypeScript, and Rust style guides. In case you are using a language not listed above, follow the Rust style guide.
[ ] Unit tests have been written where possible.
[ ] If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries, or the Snowflake database integration, a run of the Extra Tests has been scheduled.
- If applicable, it is suggested to paste a link to a successful run of the Extra Tests.

enso-org / enso