Intermittent rich text tests: "should filter and commit first mention into the editor on Enter"

[jattasNI]

🧹 Tech Debt

These tests are intermittent and are going to be disabled in #2151 and #2160: "RichTextEditorMentionListbox user mention via mention list box..."

1. "should commit mention into the editor when clicked"
2. "should commit mention into the editor on Enter"
3. "should commit mention into the editor on Tab"
4. "should filter and commit first mention into the editor on Enter"
5. "should filter and commit first mention into the editor on Tab"
6. "should show mention popup for multiple mention configuration elements"

Failing builds

1. https://github.com/ni/nimble/actions/runs/9353948801/job/25745664409?pr=2149
2. https://github.com/ni/nimble/actions/runs/9354603119/job/25747812654#step:17:2113
3. https://github.com/ni/nimble/actions/runs/9370555481/job/25797800389#step:17:2095
4. https://github.com/ni/nimble/actions/runs/9374325766/job/25810106139?pr=2158

Error message [test-concurrent:nimble-components] [test-chrome:verbose] 1) should filter and commit first mention into the editor on Enter RichTextEditorMentionListbox user mention via mention list box Uncaught InvalidStateError: Failed to execute 'collapseToEnd' on 'Selection': there is no selection. thrown

Context Nimble updated dependencies recently in #2148 and that included a change to prosemirror so it's possible that contributed to this.

[jattasNI]

@vivinkrishna-ni let me know if you'd like an AzDO bug to track this

[vivinkrishna-ni]

@jattasNI I've created a bug in AzDo to track this. We will work to investigate further the test failures. AzDo bug link: Bug 2761938: Intermittent failures in Rich Text Editor for Mention support

[m-akinc]

Added three more tests that I had fail on me.