File upload on modular forms with hash

This issue is quite specific but it's an issue none the less. This issue affects front end forms on modular pages.

**Steps to reproduce:**

1. Create a modular page
2. Add a form to one of the pages
3. Add a `file` field to the form
4. In the form action put something like `'/my-page#contact'` (the page plus an anchor).
5. Submit the form as a user

**Expected result:**
The form submits all of the data and uploads the file to the directory you have specified. If using Email then the file should also be attached.

**Actual result:**
The form submits all of the data **except for** the file upload. Nothing uploads and if using Email then all of the data is sent **except for** the file upload.

I know this is a little obscure but I was working on it for many hours until I figured out that the file wasn't uploading because of the anchor.