Issues with new admin tool

[mcpherrinm]

I've been testing out the new admin tool and have the following quality-of-life problems:

Some are relatively straightforward tool fixes:

• [x] #7358
• [x] #7357
• [x] #7460

Some are a bit gnarlier:

• [x] #7359
• [ ] #7355
• [ ] https://github.com/letsencrypt/boulder/issues/6864 (maybe a duplicate of the above)
• [ ] #7292
• [ ] #7350

[mcpherrinm]

I dumped thoughts into one ticket here, but I'm going to split a few out into their own for sharing them

[aarongable]

Feel free to use GitHub's magic "Convert to issue" button to get auto-linking between these checklist items and the new bugs.

[mcpherrinm]

oh I had no idea that existed, thank you!

[jcjones]

Added https://github.com/letsencrypt/boulder/issues/7292 to this meta-list