Fix/repeat announcements not working

[Luciaisacomputer]

What is this PR for?

This solves the issue where some screen readers, such as VoiceOver, don't repeat an announcement if the text remains the same. It checks to see if the message is the same as what is currently within the components state, and then if it is the same it appends the string with a non-breaking space. I've seen this solution used a couple of times before for the same problem.

Where should the reviewer start?

1. Open up your local environment and go to the basic test page here: http://127.0.0.1:8080/basic/

What should the reviewer look at?

1. Start VoiceOver (or any other screen reader tool)
2. Click on the Trigger New Announcement button
3. You should hear an announcement
4. Click on the button again
5. You should hear the same announcement again.

What gif best describes this PR or how it makes you feel?

Additional comments:

I'm still fairly new to React so please let me know if I am breaking any rules here.

Definition of Done:

• [❓] Is there appropriate test coverage?
• [❓] Does this pass all automatic linting?
• [❓] Does the documentation need to be updated?
• [❌] Does this add new dependencies?

[pezfish]

@LukePettway This is a really great solution. The only comment I would say is to move it into the component itself instead of the demo page. That way whoever is using it doesn't have to rely on a specific implementation.

We probably could check that value on componentWillReceiveProps and update as necessary.

[Luciaisacomputer]

Thanks, I'll work on implementing that and let you know when it is ready.

[Luciaisacomputer]

@pezfish so it looks like you were right, I just needed to add a state, and then use that in my check to see if the value matched, then use setState() to update the value.

[tikaro]

FYI, @LukePettway and @pezfish , I just added "branch protection" to the master branch, since that seemed like a pretty good idea (thanks for the suggestion, Luke!)

If I've done this the way I think I have, when pezfish approves the PR, that will unblock merging. We'll see if I've done it right once pezfish approves!

[pezfish]

Looks good. Thanks.