nicely fade out and transition the file picker before going back to the gallery, when cancelled picking a file
Position in gallery detail should be a 1-based index
Extract gallery rendering to an external class and also slightly improve rendering of it
Add a first draft of coach marks in the first screen, specially for first time users
spacing, slightly improve semantics and also fix bug with clicking on the gallery when not visible
Add a bunch of new shaders!
Refactor some shaders and add another one (backto1980)