Add transparent background color to versions switcher (#30192)
Add transparent background color to versions switcher (#30192)


m5o/bootstrap,twbs/bootstrap,tjkohli/bootstrap,zalog/bootstrap,inway/bootstrap,GerHobbelt/bootstrap,coliff/bootstrap,inway/bootstrap,zalog/bootstrap,inway/bootstrap,m5o/bootstrap,tjkohli/bootstrap,GerHobbelt/bootstrap,twbs/bootstrap,coliff/bootstrap,zalog/bootstrap,GerHobbelt/bootstrap