[style]: misc. UX/UI

[igoroganesian]

Didn't see a list of these elsewhere so here are a few observations:

1. Guide: having all animations active taxes the browser
2. Guide: all "exercises" (including stretches, static poses etc.) are currently in one alphabetized list
3. Guide and Schedule: users can hover over the panels but clicking does nothing, it's confusing
4. Schedule: these are just 4 categories? where's the schedule
5. Docs: images are difficult to read, have to manually zoom in. Also, these are dev-specific (there's already an issue for this)