Adjust limited article width to a max of 1280px
Adjust limited article width to a max of 1280px

see #957

monotek/zammad,monotek/zammad,zammad/zammad,monotek/zammad,zammad/zammad,monotek/zammad,zammad/zammad,monotek/zammad,zammad/zammad,zammad/zammad,monotek/zammad,zammad/zammad