Closes #12195
Closes #18737

Description

• Adds onto the existing functionality merged inside of the "Open With" modal (See PR 21436)
• When users open a repository through "Open With" they are given the option to save the editor preference.

• This preference is saved locally for the repository and the next time they open the repository they will see this option instead of the global editor. (In the screenshot below, VS Code is my global editor)

• As you would expect, the global editor still shows up for other repositories. So if a user does not explicitly change this settings, they wouldn't even know it's a feature.

• Users can also easily reconfigure the existing editor selection through a new page on "Repository Settings"

Screenshots

• Also tested to ensure that External Editor customization isn't broken by this.

Release notes

Notes: Allows Users to save Editor preference per repository