disable element type select when not using an element creation tool in batch creation mode

vue/Element/AnnotationPanel.vue

@@ -25,7 +25,9 @@
             />
             <label for="switchBatchCreation">Enable batch creation (no prompt)</label>
           </span>
+        </fieldset>
 
+        <fieldset :disabled="elementTypeSelectDisabled" :title="elementTypeSelectDisabled ? 'Element type selection is only available for element creation tools.' : ''">
           <div class="field mt-2">
             <label class="label">Element type</label>
             <div class="control">
@@ -87,6 +89,12 @@ export default {
     batchFormDisabled () {
       return !['rectangle', 'polygon', 'deletion'].includes(this.tool)
     },
+    /**
+     * Disable the element type selection dropdown if not using an element creation tool.
+     */
+    elementTypeSelectDisabled () {
+      return !['rectangle', 'polygon'].includes(this.tool)
+    },
     batchCreation: {
       get () {
         return this.$store.state.annotation.batchCreation