* wip
* display known unix timestamps as date strings in property filter select box
* show selected unix timestamp property as a datetime string in the property filter
* remove console.log
* update test to construct property definition correctly
* correct another test
* dates have different operators
* format property filter values for display in Select boxes and the PropertyValue component
* fix typescript error
* it _is_ a type, I don't need to say it is
* don't have before and after for unmatched types of operators
* separate the current applicable operators and the operator to display mapping, and add cypress tests for before and after operator visibility
* correct cypress test
* remove unused method
* remove dangling comment
* why does test fail in CI but not locally
* why does test fail in CI but not locally
* why does test fail in CI but not locally
* log values of operator options, why does this fail in CI but not locally
* why does test fail in CI but not locally
* intercept more decide calls to try and set feature flags from cypress test
* why does test fail in CI but not locally
* Remove cypress install
* add a readme for how to test feature flags so it isn't lost if there are no tests currently testing feature flags
