Convert Y axis to value for increment

refs #10324
Fix some compiler warnings

Refs #10324
Moving by 1 spectra working, needs refactoring

Refs #10324
Update scroll bars on resize

Refs #10324
Correct compiler warning

Refs #10324
Correct scroll bar movement

Refs #10324
Merge branch 'feature/10324_spectrum_view_keys_move_by_one_spectrum' into develop