Safer handling of missing params

Update for correct simple parameter semantics

Simple and Super-Simple flight mode support

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Strings can be expensive to create, all the issues with allocation,
copy of the char members, conversion to UTF-16. QStringLiteral creates
one in compile time.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>