Change the first step to be drive selection and the second step to be
image selection, instead of vice versa as it previously was.
Changelog-Entry: Swap the order of the drive and image selection steps.
This refactoring will be useful on future changes, where there will be
a single application entry point that will execute the CLI or the GUI
version depending on the environment.
Signed-off-by: Juan Cruz Viotti <jviottidc@gmail.com>
