Enhanced Tab and Group Support

[quicken]

This release introduces two experimental features:

1. A setting that enables a read-only "Editors" group. This group shows a list of all currently open text documents that are stored in a file system.
2. A setting that automatically adds files to a pinned group as files are opened.

Also, introduce a setting that allows turning off Groups defined inside of a Project File.

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This discussion was created from the release Enhanced Tab and Group Support.