Reset commit message after a successful abort triggered through the UI
Reset commit message after a successful abort triggered through the UI

According to @smashwilson
> it may be worth triggering some of that behavior manually if a user aborts (or, eventually, initiates) a merge through our UI. in terms of reliability - on all three platforms there is some risk of dropped events that increases with the number of events that arrive in quick succession (like if a ton of files are created at once). merges in huge repositories _might_ trigger this but it shouldn't be common.

Co-Authored-By: Ash Wilson <8d458f55d3052bb46018ce3f1d443514622c0f93@gmail.com>

atom/github,atom/github,atom/github