Use Sublime Text in text fields like commit message

[eugenesvk]

Problem description

Sublime Text has a lot of useful user-configurable options from modal editing to keybinds to autocompletes. However, when editing text in Sublime Merge, all that customization wealth is lost and is either unavailable or has to be configured from stratch.

Preferred solution

Allow using Sublime Text as an editor in some text fields. Ideally the commit text field would become an ST text field wth ST overtaking everything untill you press "close tab"

Alternatives

Or you could create a temp file and auto-open it in Sublime Text for editing with a user defined syntax and do "live sync" similar to how you can currently edit web browser's text fields with Sublime Text via an extension.
This isn't as seamless, but would also work

Screenshots

n/a