Redo: Add copy to clipboard for about brave page

[luixxiul]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Closes #6183

Test Plan:

1. Visit about:about

[luixxiul]

Closing for now

[bsclifton]

@luixxiul I think this was a good fix 😄 (didn't need to be closed yet- just needed a reviewer)

@gyandeeps as the original author, would you be interesting in reviewing these changes? You had originally submitted #6107 and that commit along with some tweaks were pulled into this PR by @luixxiul. I think his fixes are great 😄

If it looks good, (since this branch has been deleted) you should be able to create a new branch and cherry-pick both commits in (I can help with that, if you're not sure). Would be great to get this one closed out 😄

[gyandeeps]

I can do that but i saw that the reverted commit has been committed basck in here: 5324f3c

Let me know what your thoughts are and will act accordingly. thanks

[bsclifton]

@gyandeeps perfect- I missed that 😄 I just now confirmed that your change is there and working great! So we just need to fix the alignment on about:about. I'll get that taken care of

[gyandeeps]

@bsclifton Here is the fix for about:about title: #6299