Subject: bug#35421: Also bind left image rotation key

From: 積丹尼 Dan Jacobson <[email-masked]>
Date: Fri, 19 Jul 2019 08:53:16 +0800

OK but add to Docstring/Info:
To rotate (right) by 90, hit ...
To rotate (right) by 180, hit ...
To rotate (right) by 270, hit ...
As these are the most common tasks.

(I'm most curious as to the recommended sequences the users should hit,
especially for 180.