add DragListHeading for cat contents

cateditor/src/components/DragListHeading.vue

@@ -0,0 +1,22 @@
+<template>
+  <v-card class="subheading font-weight-bold ma-0 pl-2" color="grey lighten-2">
+    <v-card-title class="">
+      {{ title }}
+      <v-spacer></v-spacer>
+<!--      <v-btn icon>
+        <v-icon class="ma-0 pa-0">add</v-icon>
+      </v-btn>
+      -->
+    </v-card-title>
+  </v-card>
+</template>
+
+<script>
+export default {
+  data: () => ({
+  }),
+  props: {
+    title: String,
+  },
+}
+</script>