Note screen

[drslowdeath]

• [ ] Position popup fix
• [x] Make pretty - Add text
• [x] Make text box larger - do not think it needs to be expandble
• [x] Add text - "Optional note attached into invoice"
• [x] Add tool tip - "Use this to leave your clients a note, inside the invoice."
• [ ] Add validation where notes are only applicable if discount is present
• [ ] Add into invoices in db