Determining commit authorship only by e-mail

[r4d1sh]

Current behavior: If I make a commit and then change my name (git config --global user.name "New Name"), GitLens will stop recognizing this commit as my own. (It will display the author instead of using the word 'You').

Proposed behavior: People often change their name in git for various reasons, but the e-mail usually remains the same. It would be better to consider only the e-mail. For example, if there are two commits with different author names but the same e-mail, we can assume that the author is the same person.

How to implement: It may be sufficient to pass null instead of name to isUserMatch function in all relevant places where it is called.