Follow-up fix for bug#11197: handle aborted AJAX calls correctly.
Follow-up fix for bug#11197: handle aborted AJAX calls correctly.

rudy500/otrs,s7design/otrs,mburggraf/otrs,s7design/otrs,rudy500/otrs,rudy500/otrs,rudy500/otrs,s7design/otrs,mburggraf/otrs,xhoy/otrs,s7design/otrs,xhoy/otrs,mburggraf/otrs,rudy500/otrs,s7design/otrs,xhoy/otrs,mburggraf/otrs,xhoy/otrs,mburggraf/otrs,xhoy/otrs