Add :empty to .custom-file-control selector (#22176)
Add :empty to .custom-file-control selector (#22176)

<label class="custom-file"><input type="file" class="custom-file-input" /><span class="custom-file-control"></span></label>
VS
<label class="custom-file"><input type="file" class="custom-file-input" /><span class="custom-file-control">test.txt</span></label>
IdanCo/bootstrap,lipis/bootstrap,davethegr8/bootstrap,Hemphill/bootstrap-docs,igoynawamreh/bootstrap,inway/bootstrap,lemuelbarango/bootstrap,zalog/bootstrap,twbs/bootstrap,hebbet/bootstrap,lemuelbarango/bootstrap,andresgalante/bootstrap,SweetProcess/bootstrap,stanwmusic/bootstrap,edanbarak/bootstrap,vsn4ik/bootstrap,9-chirno/chirno,SweetProcess/bootstrap,tibo66/bootstrap,xt0rted/bootstrap,bootstrapbrasil/bootstrap,Lyricalz/bootstrap,stanwmusic/bootstrap,9-chirno/chirno,bardiharborow/bootstrap,davethegr8/bootstrap,yuyokk/bootstrap,bardiharborow/bootstrap,joblocal/bootstrap,gijsbotje/bootstrap,TheFridayInstitute/bootstrap,tibo66/bootstrap,nice-fungal/bootstrap,zalog/bootstrap,edanbarak/bootstrap,Hemphill/bootstrap-docs,fschumann1211/bootstrap,GerHobbelt/bootstrap,bootstrapbrasil/bootstrap,coliff/bootstrap,lemuelbarango/bootstrap,sealocal/bootstrap,bardiharborow/bootstrap,afuno/bootstrap,lipis/bootstrap,Scoutski/bootstrap,bootstrapbrasil/bootstrap,gijsbotje/bootstrap,sealocal/bootstrap,tagliala/bootstrap,kvlsrg/bootstrap,afuno/bootstrap,Hemphill/bootstrap-docs,seanwu99/bootstrap,Lyricalz/bootstrap,igoynawamreh/bootstrap,Scoutski/bootstrap,9-chirno/chirno,xt0rted/bootstrap,andresgalante/bootstrap,realcrowd/bootstrap,IdanCo/bootstrap,twbs/bootstrap,vsn4ik/bootstrap,stanwmusic/bootstrap,vsn4ik/bootstrap,jipexu/bootstrap,realcrowd/bootstrap,joblocal/bootstrap,supergibbs/bootstrap,afuno/bootstrap,johnajacob/bootstrap,creativewebjp/bootstrap,GerHobbelt/bootstrap,seanwu99/bootstrap,tagliala/bootstrap,johnajacob/bootstrap,peterblazejewicz/bootstrap,Hemphill/bootstrap-docs,edanbarak/bootstrap,seanwu99/bootstrap,SweetProcess/bootstrap,xt0rted/bootstrap,Delagen/bootstrap,davethegr8/bootstrap,janseliger/bootstrap,coliff/bootstrap,jipexu/bootstrap,tagliala/bootstrap,realcrowd/bootstrap,m5o/bootstrap,yuyokk/bootstrap,Scoutski/bootstrap,NCARB/bootstrap,realcrowd/bootstrap,peterblazejewicz/bootstrap,yuyokk/bootstrap,seanwu99/bootstrap,zalog/bootstrap,joblocal/bootstrap,afuno/bootstrap,SweetProcess/bootstrap,yuyokk/bootstrap,stanwmusic/bootstrap,NCARB/bootstrap,hebbet/bootstrap,lemuelbarango/bootstrap,m5o/bootstrap,supergibbs/bootstrap,hebbet/bootstrap,andresgalante/bootstrap,sealocal/bootstrap,xt0rted/bootstrap,igoynawamreh/bootstrap,hebbet/bootstrap,NCARB/bootstrap,joblocal/bootstrap,Delagen/bootstrap,Delagen/bootstrap,igoynawamreh/bootstrap,lipis/bootstrap,jipexu/bootstrap,9-chirno/chirno,TheFridayInstitute/bootstrap,jipexu/bootstrap,fschumann1211/bootstrap,tjkohli/bootstrap,andresgalante/bootstrap,supergibbs/bootstrap,nice-fungal/bootstrap,Lyricalz/bootstrap,IdanCo/bootstrap,davethegr8/bootstrap,gijsbotje/bootstrap,Delagen/bootstrap,TheFridayInstitute/bootstrap,tibo66/bootstrap,janseliger/bootstrap,NCARB/bootstrap,Scoutski/bootstrap,johnajacob/bootstrap,Lyricalz/bootstrap,bardiharborow/bootstrap,supergibbs/bootstrap,johnajacob/bootstrap,fschumann1211/bootstrap,kvlsrg/bootstrap,creativewebjp/bootstrap,creativewebjp/bootstrap,inway/bootstrap,inway/bootstrap,nice-fungal/bootstrap,tjkohli/bootstrap,sealocal/bootstrap,gijsbotje/bootstrap,vsn4ik/bootstrap,janseliger/bootstrap,janseliger/bootstrap,IdanCo/bootstrap,edanbarak/bootstrap,kvlsrg/bootstrap,creativewebjp/bootstrap,peterblazejewicz/bootstrap,lipis/bootstrap,TheFridayInstitute/bootstrap,fschumann1211/bootstrap,GerHobbelt/bootstrap,tibo66/bootstrap