Hi Jakob,
1. Do you want to hide the help option?
2. Here is grayscale in desktop: http://i.imgur.com/teWgizS.jpg
3. There is no built-in way to do this
4. What value did you give?
5. It’s an icon. you can change it in CSS.
This is the value:
.fa-wheelchair:before {
content: "\f193";
}You can choose from here: http://fontawesome.io/icons/#accessibility
and just replace the font value.