Reintroduce description for "Set tape content" and "Set final states".

- Previously it were two buttons
- Buttons require interactions. I want to avoid that
- Text alone is fine.
Use brighter color for #notes

According to one user, the notes are not flashy enough and can be easily
overlooked. A brighter background color might help to fix that.
Windows does not provide a font containing U+E08C

- U+E08C is missing on default Windows 7 and 8* systems
- Now use a text notification instead