Homepage rework

[lhjohn]

Issues that can be approached in Moodle 3.X:

• Messaging: Vague/unclear statements such as "tool ecosystem" make connection to "Tools" course category, not connecting with experts, joining the journey has no recognition value for new students, meet like-minded people not apt.

Wait for Moodle 4.0 before approaching the following UI and UX issues:

• UI: Font size, font colour,
• Images: Class room images not representative of Academy learning.
• Link to EHDEN homepage and OHDSI, add more logos
• Use navigation drawer for sub pages with more detail