Scroll to uploaded file in file list

When files are uploaded, the cursor scrolls down to the last one and make it blink.

fixes #733
This is actually wrong. You are expecting an array in the form `[{name:'file1.txt'},{name:'file2.txt'}]`.
Ideally this function should accept an array of strings like `['file1.txt', 'file2.txt']`.
Then in the upload.js file you can call it using `_.pluck(files, 'name')`. This will automatically flatten the array by picking all `name` properties.