Release 7.4.1

This is a bug fix release which resolves an issue with RangeEditor not handling
None for either the high or low value, as well as an issue with ProgressColumn
rendering.

Thanks To

• Steve Allen
• Chris Angell
• Aaron Ayres
• Maxwell Grady
• Johannes Loibl
• Rahul Poruri
• Corran Webster
• Hai Yan

Fixes

• Fix issue with progress column rendering on Linux and Windows. (#1937)
• Fix typos in docstrings (#1935)
• Fix range text editor bug (#1931)
• Fix issue where file editor filters were not used in simple editor (#1930)