Event filters display

Fixed

• Update activities/event types/labels filters so all options are shown at once
• Fix date picker using wrong date format/timezone

All changes

• feat(event-filters): increase multi select viewport & hide clear on empty filter by @2Kable in #744
• Fix crawler test err 500 on None user agents by @gdaviet in #745
• fix(event-filters): set locale to french by @2Kable in #746
• Fix parsing of date strings in event api by @gdaviet in #747
• Fix display of filter multiselect (prevent overflowing top of viewport) by @gdaviet in #748
• Fix initialization of date filter by @gdaviet in #750

Full Changelog: v23.2...v23.3