Revert "Rely on opts being pre-populated"

This reverts commit bf1f3b8d.

javascript/imageviewer.js

@@ -97,12 +97,19 @@ function galleryImageHandler(e){
 }
 
 onUiUpdate(function(){
-    fullImg_preview = gradioApp().querySelectorAll('img.w-full')
-        if(fullImg_preview != null){
-	    fullImg_preview.forEach(galleryImageHandler);
-    }
+	fullImg_preview = gradioApp().querySelectorAll('img.w-full')
+	    if(fullImg_preview != null){
+		fullImg_preview.forEach(galleryImageHandler);
+	}
+
+    if(Object.keys(opts).length != 0) return;
+
+    json_elem = gradioApp().getElementById('settings_json')
+    if(json_elem == null) return;
 
-    if(Object.keys(opts).length == 0) return;
+    textarea = json_elem.querySelector('textarea')
+    jsdata = textarea.value
+    opts = JSON.parse(jsdata)
 
     if(!window.lightbox_settings_applied){
         window.lightbox_settings_applied = true;