Feature #446 - Render the submission form using the render_divs macro

Feature #446 - Render the submission form using the render_divs macro

- Currently there are individual calls to wtforms_util.render_field_div
for each field in the media submit form, which is too verbose
- Matched the field ordering in submit/form.py to the verbose version
- hacks the correct textareafield rendering with hard-coded rows and
columns.
- TODO - figure out how to pass the textarea dimensions with **kwargs