Collect metadata from glb file

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

modules/glmv-upl.js

@@ -10,6 +10,10 @@ checkForGltf = function (e) {
         const mvPreview = document.createElement('model-viewer')
         mvPreview.style['width'] = '180px'
         mvPreview.style['height'] = '180px'
+        mvPreview.addEventListener('load',(e) => {
+            mw.storage.session.set( 'mw_glbMeta', JSON.stringify($(e.target.originalGltfJson.asset)))
+        },
+        {once: true})
 
         const dThumbCap = document.createElement('div')
         dThumbCap.classList.add('thumbcaption')