Added use uft8 pragma.
Ported screens to tt.
Switched Kernel/System/Survey.pm to Object Manager.
Switched Kernel/System/Survey/Answer.pm to Object Manager.
Switched Kernel/System/Survey/Question.pm to Object Manager.
Switched Kernel/System/Survey/Request.pm to Object Manager.
Switched  Kernel/System/Survey/Vote.pm to Object Manager.
Switched Kernel/System/Ticket/Event/SurveySendRequest.pm to Object Manager.
Switched bin/otrs.SurveyTriggerSendRequests.pl to Object Manager.
Switched var/packagesetup/Survey.pm to Object Manager.
Switched scripts/test/Survey.t to Object Manager.
Changed class from Error to Warning.
Added visual fixes.
Fixed footer layout.
Improved layout.
Added several visual improvements.
Fixed display of elements.
Added visual improvements.
Fixed menu links.
Fixed icons visibility and layout.