UI feedback for wizard

[nathandunn]

Test link

• [x] merge into a single wizard
• [x] add samples counts to header
• [x] remove header
• [x] "Select Analysis Method"
• [x] remove "default gene sets stuff"
• [ ] add gene stuff to an advanced disclosure panel
• [ ] fix fonts (use the other assets)
• [ ] info icon for analysis methods
• [ ] add help doc into gitbook to link into
• [ ] fix background color (use green or red background color: http://xena.ucsc.edu/)
• [ ] better wording for Gene Set Comparison (add google doc for wording?)
• [ ] emulate SS Done button selection
• [ ] (last screen) fix fonts
• [ ] (last screen) fix background color

[nathandunn]

Color palette: https://drive.google.com/drive/u/1/folders/1t3H6JJcOcz9PlAfuRZy1P2BQCH5wqT1I

[nathandunn]

wording fixed in #531