Update the browser debugging menu

[PalmerAL]

• Added an option to open the devtools for the places service, which might help with debugging can't see bookmarks & history once I exit Min and restart Min. #2503.
• Changed the browser devtools options to appear only when Min is run with the --debug-browser argument, or with the existing --development-mode.
  • Having these options appear during regular usage is somewhat confusing (it's possible to get mixed up between the browser devtools and the page devtools), and also a potential source of security issues - if someone can be convinced to paste malicious code into the browser devtools, the consequences are quite bad. I don't know of any specific instances of this happening, but it seems worthwhile to address preemptively.

Normal mode:

Debug mode: