Fixed action menu of root node not working

src/jsonData.js

@@ -619,6 +619,10 @@ export function findPropertyIndex (object, prop) {
  * @return {Array}
  */
 export function parseJSONPointer (pointer) {
+  if (pointer === '/') {
+    return []
+  }
+
   const path = pointer.split('/')
   path.shift() // remove the first empty entry
 

test/jsonData.test.js

@@ -285,6 +285,8 @@ test('parseJSONPointer', t => {
   t.deepEqual(parseJSONPointer('/obj/a'), ['obj', 'a'])
   t.deepEqual(parseJSONPointer('/arr/-'), ['arr', '-'])
   t.deepEqual(parseJSONPointer('/foo/~1~0 ~0~1'), ['foo', '/~ ~/'])
+  t.deepEqual(parseJSONPointer('/obj'), ['obj'])
+  t.deepEqual(parseJSONPointer('/'), [])
 })
 
 test('compileJSONPointer', t => {