Since we are about to release it's time to finally fix our linting. This
patch basically runs eslint --fix and does some further manual fixes.
Also it sets up eslint to fail on every warning on order to make
warnings visable in the CI process.
There should no functional change be introduced.
Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>
This fixes part of #1056: an error while obtaining the profile
would have `502`-crashed the server.
Signed-off-by: Claudius Coenen <opensource@amenthes.de>
