Slide selected keyframes (shift+T) missing in graph editor

Slide selected keyframes (shift+T) doen't work in graph editor and missing in key -> transformation panel but work well in dope-sheet and find it missingin graph editor, that is not logic because to apply sliding with visual graph we need to open additional area of dope sheet and apply sliding on dope sheel and see effect in the exicted graph editor => more inconvinient UI SPACE TAKEN by dope sheet only to apply sliding , see image