The branch 4.4/keyboard-shortcuts was deleted and repushed:
was 81647af20974d2ff0ccf9f928541b17d5755e851
now fe0c4bbb0a3d9877b467a060ce58c4464b1abb72
1: 81647af < -: ------- add global / page-specific keyboard shortcuts
-: ------- > 1: fe0c4bb add global / page-specific keyboard shortcuts