Fix show pending notifications
Fix show pending notifications

Make sure that past pending notifications don't owerride the curent
ones. The main case where this might occur is when running migrations to
add notifications for existing objects.

edofic/ggrc-core,uskudnik/ggrc-core,edofic/ggrc-core,VinnieJohns/ggrc-core,andrei-karalionak/ggrc-core,hyperNURb/ggrc-core,selahssea/ggrc-core,jmakov/ggrc-core,uskudnik/ggrc-core,j0gurt/ggrc-core,j0gurt/ggrc-core,prasannav7/ggrc-core,j0gurt/ggrc-core,vladan-m/ggrc-core,prasannav7/ggrc-core,kr41/ggrc-core,AleksNeStu/ggrc-core,hasanalom/ggrc-core,VinnieJohns/ggrc-core,josthkko/ggrc-core,kr41/ggrc-core,vladan-m/ggrc-core,andrei-karalionak/ggrc-core,vladan-m/ggrc-core,hasanalom/ggrc-core,edofic/ggrc-core,plamut/ggrc-core,jmakov/ggrc-core,VinnieJohns/ggrc-core,josthkko/ggrc-core,hyperNURb/ggrc-core,NejcZupec/ggrc-core,plamut/ggrc-core,NejcZupec/ggrc-core,vladan-m/ggrc-core,kr41/ggrc-core,jmakov/ggrc-core,AleksNeStu/ggrc-core,j0gurt/ggrc-core,edofic/ggrc-core,andrei-karalionak/ggrc-core,kr41/ggrc-core,uskudnik/ggrc-core,plamut/ggrc-core,selahssea/ggrc-core,plamut/ggrc-core,NejcZupec/ggrc-core,VinnieJohns/ggrc-core,uskudnik/ggrc-core,hyperNURb/ggrc-core,hyperNURb/ggrc-core,selahssea/ggrc-core,hasanalom/ggrc-core,AleksNeStu/ggrc-core,andrei-karalionak/ggrc-core,hasanalom/ggrc-core,vladan-m/ggrc-core,selahssea/ggrc-core,hasanalom/ggrc-core,AleksNeStu/ggrc-core,jmakov/ggrc-core,josthkko/ggrc-core,hyperNURb/ggrc-core,jmakov/ggrc-core,NejcZupec/ggrc-core,prasannav7/ggrc-core,josthkko/ggrc-core,uskudnik/ggrc-core,prasannav7/ggrc-core