Installer fails when no database is selected
When installing, in the step "Select database" you can click "Continue" without selecting a database. The installer then fails with the exception "No database selected!". Probably we could catch this ...
[BUGFIX] Installer fails when no database is selected
Display an error message, if the selected database name is empty.
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Oliver Klee
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind