feat: Added about zulip option to main menu

[tomlin7]

fix: #1128

Changes

• Added About Zulip option to main menu

[chrisbobbe]

This will need to follow our Git style before it gets a review from a core team member. It also needs tests and localization.

[tomlin7]

@chrisbobbe I have added localization and tests for the "about zulip" menu button.

I have noticed the commit messages, not to make any further mess here I will open a fresh new PR for this.

[chrisbobbe]

Please don't open a fresh new PR for the same work; that's not necessary. Just force-push to the same branch: https://zulip.readthedocs.io/en/latest/git/using.html

[tomlin7]

@chrisbobbe sure, I will keep that in mind. But #1157 has already been opened for this; please check.

[chrisbobbe]

But #1146 has already been opened for this

I think you mean #1157? (This issue is #1146.)

[tomlin7]

@chrisbobbe my bad! pardon, I was a bit nervous about git rebase, and yes that is the correct PR #1157.

I have found this page really helpful: https://zulip.readthedocs.io/en/latest/git/fixing-commits.html