Bug 848311 - [email] fix secret debug menu's fancy structured debug logging saving to DeviceStorage. a=debug-only

This includes some whitespace changes from changes to the GELAM build process
that did not merit their own commit.
Merge pull request #8495 from asutherland/email-fancy-log-save-fix

Bug 848311 - [email] fix secret debug menu's fancy structured debug logg...