Apply Theme updates each Windows

[ricaun]

Summary of the Pull Request

When the theme changes to light/dark all the RevitLookUp windows update the theme.

https://github.com/jeremytammik/RevitLookup/assets/12437519/36e1b07b-9781-4052-9ebb-486022db9229

Tested in Window 10 - #194

Quality Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings

[Nice3point]

Perfect) Many thanks 😊