style(sig): Inbox list chrome cleanup

[Twixes]

Changes

1. Removing this extra scan line loader, which was for indicating continuous refresh, but is redundant vs. the red dot.

1. All of the below was selectable text like browser content, but in a desktop app that's wrong - only dynamic content should be selectable with a text cursor.

[Twixes]

• feat(sig): Report list toolbar as core control #1532
• feat(sig): Inbox toolbar disabled clarity #1531
• style(sig): Inbox list chrome cleanup #1530 👈 (View in Graphite)
• feat(sig): add modifying report state via inbox #1513 : 1 other dependent PR (#1543 )
• feat(sig): break inbox into some components #1505
• main

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[Twixes]

Merge activity

• Apr 8, 10:43 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Apr 8, 10:45 AM UTC: Graphite rebased this pull request as part of a merge.
• Apr 8, 10:54 AM UTC: @Twixes merged this pull request with Graphite.