[Timepicker] Ensure we filter out undefined values (elastic#51458) (e…

…lastic#51752)

* Fix error with undefined from or to

* PR feedback

* Remove unnecessary test

src/plugins/data/public/query/timefilter/time_history.ts

@@ -37,7 +37,7 @@ export class TimeHistory {
   }
 
   add(time: TimeRange) {
-    if (!time) {
+    if (!time || !time.from || !time.to) {
       return;
     }