Block List: Fix inline mode

[andrejd22]

Fix for #20618

Prerequisites

• I have added steps to test this contribution in the description below

If there's an existing issue for this PR then this fixes

Description

[github-actions]

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[Copilot]

Pull Request Overview

This PR refactors the block workspace view edit component to use container IDs instead of keys for tab identification. The changes simplify tab management by removing redundant state tracking and aligning with the proper data structure.

• Removes commented-out code and unused _activeTabName state variable
• Changes tab identification from using tab.key to tab.ids[0]
• Simplifies the #setTabName method to #setTabKey by removing the unused tab name parameter
• Improves code formatting and consistency

[nielslyngsoe]

@andrejd22 Very good, and so well spotted.

I took the freedom to improve a little bit now that the PR came around here.
I will as well investigate if we can backport this.

Thanks for the insight and work, this surely helped getting this issue resolve faster!

[umbracocommunity]

This pull request has been mentioned on Umbraco community forum. There might be relevant details there:

https://forum.umbraco.com/t/minor-update-makes-content-not-accessible/6715/2