Add "save" shortcut to settings screens

[novaugust]

On a post, ctrl/cmd + s saves the post. I don't see any reason why the same shouldn't be the case for the various settings screens!

• Save settings/user/xx user screen with ctrl/cmd+s
• Save settings/general screen

See the core/client/utils/editor-shortcuts for an example of how to make an OS specific shortcuts hash, and core/client/routes/posts.js's shortcuts + actions hashes for an example of how this should be implemented in the two settings routes.

[naz]

Hi, would love to give this one a try.

[novaugust]

👍 Go for it @gargol! Get in touch here or on IRC if you have any issues :)

[naz]

I broke it down to two separate commits as these are different pages. Is it ok, or should I squash them?

Also had a look at how OS specific shortcuts were done in re/client/utils/editor-shortcuts, but for simplicity sake just left it with regular notation as 'command+s, ctrl+s': 'save'

Let me know if I missed anything.

[novaugust]

@gargol the problem with command+s, ctrl+s is that macs have both of those keys. So now there's two ways of saving on a mac, and we can't assign ctrl+s to anything else (or let their browser use it). So, it does indeed need the weirdness :)
And yes, all one commit please! Once you've done that, open the PR and we'll finish the conversation on it :D
Thanks!