Update whoops to version 1.07, port template tweaks

Compare view `1.0.6...1.0.7`: https://github.com/filp/whoops/compare/1.0.6...1.0.7

This PR updates whoops to version `1.0.7`, and introduces the needed template tweaks, including a missing tweak that was not ported in the `1.0.6` update (#1763).

Cheers!