Hopefully make keyboard shortcuts behave better.•••Use keypress instead of keyup events where possible. This might help with the
problem sometimes seen that hitting CTRL-R will load the "relations" page,
because it uses the "r" key as shortcut.
Fix problem with unknown filters.•••This used to result in an "undefined method `[]' for nil:NilClass" when a
filter was used in the API call that the API didn't know about.