Scopes: Fix free text input crash (#89652)

.betterer.results

@@ -2904,6 +2904,9 @@ exports[`better eslint`] = {
     "public/app/features/dashboard-scene/scene/PanelMenuBehavior.tsx:5381": [
       [0, 0, 0, "Do not use any type assertions.", "0"]
     ],
+    "public/app/features/dashboard-scene/scene/Scopes/ScopesInput.tsx:5381": [
+      [0, 0, 0, "Do not use any type assertions.", "0"]
+    ],
     "public/app/features/dashboard-scene/scene/row-actions/RowActions.tsx:5381": [
       [0, 0, 0, "No untranslated strings. Wrap text with <Trans />", "0"],
       [0, 0, 0, "No untranslated strings. Wrap text with <Trans />", "1"],

public/app/features/dashboard-scene/scene/Scopes/ScopesInput.tsx

@@ -35,13 +35,20 @@ export function ScopesInput({
       let titles: string[];
 
       if (path.length > 0) {
-        titles = path.map((nodeName) => {
-          const { title, nodes } = currentLevel[nodeName];
+        titles = path
+          .map((nodeName) => {
+            const cl = currentLevel[nodeName];
+            if (!cl) {
+              return null;
+            }
 
-          currentLevel = nodes;
+            const { title, nodes } = cl;
 
-          return title;
-        });
+            currentLevel = nodes;
+
+            return title;
+          })
+          .filter((title) => title !== null) as string[];
 
         if (titles[0] === '') {
           titles.splice(0, 1);