Add a timeout for file upload if we can't make a thumbnail

www/common/common-thumbnail.js

@@ -197,6 +197,13 @@ define([
     };
     Thumb.fromBlob = function (blob, _cb) {
         var cb = Util.once(_cb);
+        // The blob is already in memory, it should be super-fast to make a thumbnail
+        // ==> 1s timeout
+        setTimeout(function () {
+            console.error("Thumbnail timeout");
+            cb('TIMEOUT');
+        }, 1000);
+        try {
             if (blob.type.indexOf('video/') !== -1) {
                 return void Thumb.fromVideoBlob(blob, cb);
             }
@@ -209,6 +216,9 @@ define([
             if (blob.type.indexOf('image/') !== -1) {
                 return void Thumb.fromImageBlob(blob, cb);
             }
+        } catch (e) {
+            return void cb('THUMBNAIL_ERROR');
+        }
         return void cb('NO_THUMBNAIL');
     };