Front-end - Product editor

[deltabrot]

Should show multiple input fields which fully reflect editable fields on the product model.

There is complexity with showing the existing qualifications, this should for the time being be populated by means of a separate call to the API to retrieve qualifications by product id (#55). Tapping the pencil icon next to the "Qualifications" field should show a pop-up modal of the qualifications editor.

Issue dependencies:
#55 #49 #52 #53