fix Tasks removed from MapRoulette dashboard if all are marked as "Disabled" bug (#2727)

* fix Tasks removed from MapRoulette dashboard if all are marked as "Disabled" bug

* Fix optional chaining for rule type check in ViewChallengeTasks component

Author: CollinBeczak

src/components/AdminPane/Manage/ViewChallengeTasks/ViewChallengeTasks.jsx

@@ -153,10 +153,10 @@ export class ViewChallengeTasks extends Component {
   // bounding box overlays on the map.
   findPriorityBounds = (challenge) => {
     const parseBoundsRule = (rule, priorityLevel, priorityBounds) => {
-      if (rule.rules) {
+      if (rule?.rules) {
         return rule.rules.map((r) => parseBoundsRule(r, priorityLevel, priorityBounds));
       }
-      if (rule.type === "bounds") {
+      if (rule?.type === "bounds") {
         return priorityBounds.push({
           boundingBox: rule.value.replace("location.", ""),
           priorityLevel,
@@ -193,16 +193,6 @@ export class ViewChallengeTasks extends Component {
       );
     }
 
-    if ((this.props.challenge?.actions?.total ?? 0) === 0) {
-      return (
-        <div className="mr-flex mr-justify-center mr-text-grey-lighter">
-          <h3>
-            <FormattedMessage {...messages.tasksNone} />
-          </h3>
-        </div>
-      );
-    }
-
     if (this.state.bulkUpdating) {
       return (
         <div className="pane-loading">