Update slides for UI

[andrie]

• We should show some examples of impressive looking Shiny apps to convey what is possible. We can use a couple from the Dev Ev gallery.

• Expand coverage to include themes

• Slide 5+ Update this section for express
  Suggestion: Rebuild the section around using the online components gallery and layouts gallery

• Slide 5 - Show how a UI function returns HTML

• Slide 6 - Update the Nomenclature slide to introduce context managers. We should explain that they are just another way to call a function.

• Slide 14 - Cards are no longer experimental

• Slide 23 - The rows and columns section should be replaced by layout_columns()

• Slide 26 - Composing UI seems too advanced for beginners. I think we’d better serve the students with more practice of the basics.

• Slide 28 - Value boxes are no longer experimental
  It would be useful to include an example of how to:

  • Include an icon in a value box
  • Include a reactive value
  • Make the color reactive?
    Check whether Carson’s valuebox builder online utility is available for Shiny for Python (there is one for Shiny for R on the bslib page)

• Slide 30- Replace Dynamic User Interfaces with @render.express

• Slide 41 - I don’t understand what the Things to Note section is referring to

• Slide 43 - We shouldn’t apologize for Shiny or the workshop