**Steps to replicate the issue** (include links if applicable):
* You give multiple files to the first screen of the Upload Wizard on Commons
*You go on to subsequent screen where you enter details of each file
* Validation finds a problem with one of them (say, a title which has already been used), so hides the "next" button
* You press "remove file" next to the problematic file
**What happens?**:
* The wizard does not restore the "submit" button
* You have to close the page because there's no way forwards, so you lose all the metadata you have for the other files
**What should have happened instead?**:
* Removing the file should have caused the page to re-validate
**Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia):
**Other information** (browser name/version, screenshots, etc.):
Browser: Firefox