Highlight selected memo

[chojs23]

Pre-submission Checklist

• [x] I have searched the existing issues and this feature has not been requested yet

Type of Feature

User Interface (UI)

Problem or Use Case

I usually archive or edit memo with shortcut but it is hard to recognize which memo is selected.

I created PR(#5250 ) for this and merged, but looks like recent version remove this.

Proposed Solution

I think it would be great if the selected memo was highlighted.

The image below is what it looks like when it was a 4de8712cb077 commit.

Alternatives Considered

No response

Additional Context

No response