No potentially malicious URLs referenced in markdown; added
servers stays in server selector list; the currently active server
is visible on the bottom right of smaller screens; a proxy configuration
can be provided now and works; a trailing slash in the added server
is no problem anymore, because it's removed.
FIXES: WEB-193
Stop ignoring .js and .json files in prettier and fix existing issues.
The `prettier-plugin-multiline-arrays` plugin is used to split arrays
with multiple elements into one line per element.