CheckList: Bug found

Bug is caused by drone value is set to null everytime orientation
change occur causing sysLink to give exception - Fixing….
Checklist: Done Bug fixing

Bug fixing done and tested. Everythings works so far….
Checklist: Re-enabling sysLink

sysLink is not creating any exception anymore :)
Checklist: Re-enabling live-data

Live-data works as expected - no exception so far….
Checklist: code cleanup
Merge pull request #407 from azrin1972/Checklist-Fix#406

Checklist fix#406