Fixed an issue where sub menu items would be invisible due to too low fixed height of the nav container.
Fixed an issue where sub menu items would be invisible due to too low fixed height of the nav container.

rudy500/otrs,MBRG/otrs,MBRG/otrs,xhoy/otrs,xhoy/otrs,MBRG/otrs,s7design/otrs,s7design/otrs,xhoy/otrs,rudy500/otrs,mburggraf/otrs,xhoy/otrs,crythias/otrs,rudy500/otrs,mburggraf/otrs,crythias/otrs,MBRG/otrs,crythias/otrs,MBRG/otrs,mburggraf/otrs,crythias/otrs,rudy500/otrs,mburggraf/otrs,xhoy/otrs,crythias/otrs,rudy500/otrs,s7design/otrs,s7design/otrs,s7design/otrs,mburggraf/otrs