Resolve "Add note to Job Offer and Extra Work"

This MR adds the possibility to add notes to job offers and extra work.

Changes

• all create and edit pages fro job offers and extra work were changed
• the job offer list page has been changed to include a '?', when hovered over with mouse the note is revealed
• individual detail pages of job offer and extra work include note field

Screenshots

Closes #36 (closed)