Add layer tree filter for "Show Broken Layers Only" (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request QGIS/qgis#56438 Author: @nyalldawson QGIS version: 3.36

Add layer tree filter for "Show Broken Layers Only"

PR Description:

When checked, only layers with broken sources will be shown in the tree. This allows users to easily find broken layers in large complex projects, where they may otherwise escape notice!

Commits tagged with [need-docs] or [FEATURE]

"[feature] Add layer tree filter for "Show Broken Layers Only"\n\nWhen checked, only layers with broken sources will be shown in the\ntree. This allows users to easily find broken layers in large complex\nprojects, where they may otherwise escape notice!"