brainbox homepage is completely unintuitive to naive brain researchers who land there

Created by: satra

@r03ert0 - i'll be working on improving landing pages for openneuro and metasearch.

we need to do something about brainbox landing page as well. here are some feedback from some users:

1. the home page has no information on what the user is supposed to do
2. the arrows don't work
3. recently visited is empty for the new user