Repair incorrect public ShareRoom details-view URL, and the layout.

I am perplexed by what changed to cause this problem to appear. Any,
fixed now - and using the same template for personal and public shares,
hooray.
Provide *some* clue that ShareRoom is password-protected, when unlocked.

For now, just 'Password provided' in details screen.

Eventually, would be good to have another icon - cloud with an unlocked lock.
Merge pull request #508 from SpiderOak/issue-504-public-shareroom-detail-urls

Repair incorrect public ShareRoom details-view URL, and the layout.