As a curator or researcher using the curation assistant app, I need to see some examples of things I can enter in certain textboxes

[jggautier]

Example values are included in the grey help text below the textbox, but these examples would be more noticeable if they were in the textboxes themselves. Then when the user clicks in the textbox, the example values disappear. See https://stackoverflow.com/questions/27820178/how-to-add-placeholder-to-an-entry-in-tkinter for how to do this with tkinter.