Fix a bug where the metadata output format wouldn't get sent to the backend

ui/media/js/main.js

@@ -894,6 +894,7 @@ function getCurrentUserRequest() {
             show_only_filtered_image: showOnlyFilteredImageField.checked,
             output_format: outputFormatField.value,
             output_quality: parseInt(outputQualityField.value),
+            metadata_output_format: document.querySelector('#metadata_output_format').value,
             original_prompt: promptField.value,
             active_tags: (activeTags.map(x => x.name))
         }

ui/media/js/parameters.js

@@ -57,11 +57,15 @@ var PARAMETERS = [
         id: "metadata_output_format",
         type: ParameterType.select,
         label: "Metadata format",
-        note: "the metadata will be saved to disk in this format",
+        note: "will be saved to disk in this format",
         default: "txt",
         options: [
             {
                 value: "txt",
+                label: "txt"
+            },
+            {
+                value: "json",
                 label: "json"
             }
         ],