Uploader: Change how people enter the required comments

Right now the user needs to fill in the comment information as follows (this is the prompt for that field): "Mountain Range - Site Name - No. of images collected - Date Uploaded - Date collected"

All the user should need to enter is the mountain range name and the date collected, the rest is available to the app. With these two pieces of information, the required entry in the comments can consistently be applied. The comment fields needs to be kept and any comments added here are appended to the end of the required comments.

This is complete when:
- the user enters mountain range
- indicates the date collected
- the user can see the final required comment on the UI
- the required text is automatically put at the front of the upload comments

Note: the required comment should not be added to the UI comments control when this is implemented

Start by tracing the uploader UI and its comments control to find where the mountain range and collection date are collected and where upload comments are assembled. Done means the UI shows the final required comment, automatically places it before any user-added comments, and does not insert that required text into the UI comments control.

Written by the indexing model from the issue text.