Well, it isn't a problem all THAT much if you're willing.
Here's what I do.
1. Pull up the main site when the 502 isn't up.
2. Go to the power adding section.
3. Duplicate the tab, keeping the second tab on the main site.
4. Fill in the power's information in the power adding section.
5. Press F5 to see if the site is still up. If so, then submit; if not, then keep it up until the site is back up.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)