Fix clear button so that it resets the dropdowns properly

app/assets/javascripts/filtered_search/filtered_search_dropdown.js.es6

@@ -117,6 +117,10 @@
       item.droplab_hidden = !match && !matchWithoutPrefix;
       return item;
     }
+
+    hideDropdown() {
+      this.getCurrentHook().list.hide();
+    }
   }
 
   global.FilteredSearchDropdown = FilteredSearchDropdown;

app/assets/javascripts/filtered_search/filtered_search_manager.js.es6

@@ -246,7 +246,15 @@
 
       this.filteredSearchInput.value = '';
       this.clearSearchButton.classList.add('hidden');
+
+      // Force dropdown to hide
+      this.mapping[this.currentDropdown].reference.hideDropdown();
+
+      // Re-Load dropdown
       this.setDropdown();
+
+      // Reposition dropdown so that it is aligned with cursor
+      this.updateDropdownOffset(this.currentDropdown);
     }
 
     checkForBackspace(e) {