fix: minor date picker UX improvements

* improvement: Date Picker

* remove unused values

* fix: search results w/ valid date returning empty

* translations from locize

* styling select

* revert studyListDateFilterNumDays

platform/ui/src/components/studyList/StudyList.js

@@ -25,7 +25,6 @@ function StudyList(props) {
     onFilterChange: handleFilterChange,
     onSelectItem: handleSelectItem,
     t,
-    //
     studyListDateFilterNumDays,
   } = props;
 
@@ -208,7 +207,6 @@ StudyList.propTypes = {
     allFields: PropTypes.string.isRequired,
   }).isRequired,
   onFilterChange: PropTypes.func.isRequired,
-  //
   studyListDateFilterNumDays: PropTypes.number,
 };