Add test to make sure we enforce focus on modal (#27723)
Add test to make sure we enforce focus on modal (#27723)


stanwmusic/bootstrap,bardiharborow/bootstrap,coliff/bootstrap,inway/bootstrap,twbs/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,m5o/bootstrap,GerHobbelt/bootstrap,kvlsrg/bootstrap,tagliala/bootstrap,inway/bootstrap,kvlsrg/bootstrap,nice-fungal/bootstrap,gijsbotje/bootstrap,inway/bootstrap,stanwmusic/bootstrap,zalog/bootstrap,nice-fungal/bootstrap,GerHobbelt/bootstrap,kvlsrg/bootstrap,gijsbotje/bootstrap,tagliala/bootstrap,twbs/bootstrap,tjkohli/bootstrap,nice-fungal/bootstrap,bardiharborow/bootstrap,GerHobbelt/bootstrap,tjkohli/bootstrap,tagliala/bootstrap,peterblazejewicz/bootstrap,zalog/bootstrap,coliff/bootstrap,peterblazejewicz/bootstrap,m5o/bootstrap,bardiharborow/bootstrap,bardiharborow/bootstrap,zalog/bootstrap,peterblazejewicz/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap