Describe how to work with UI files
Epic: https://source.puri.sm/Librem5/use-cases/issues/62
@adrien.plazas brings up points against glade usage. We should have a very clear guideline in the documentation how to handle UI files that works both for newcomers as well as for people very familiar with GTK+. @adrien.plazas can you expand on this?
Edited by Heather Ellsworth