fix on __admin_media_prefix__ about the trailing slash
fix on __admin_media_prefix__ about the trailing slash

christianwgd/mezzanine,dekomote/mezzanine-modeltranslation-backport,geodesign/mezzanine,sjuxax/mezzanine,tuxinhang1989/mezzanine,adrian-the-git/mezzanine,readevalprint/mezzanine,gradel/mezzanine,Skytorn86/mezzanine,dovydas/mezzanine,dustinrb/mezzanine,viaregio/mezzanine,readevalprint/mezzanine,emile2016/mezzanine,dovydas/mezzanine,frankier/mezzanine,adrian-the-git/mezzanine,jerivas/mezzanine,ZeroXn/mezzanine,dekomote/mezzanine-modeltranslation-backport,stephenmcd/mezzanine,vladir/mezzanine,stephenmcd/mezzanine,Kniyl/mezzanine,theclanks/mezzanine,christianwgd/mezzanine,readevalprint/mezzanine,frankier/mezzanine,AlexHill/mezzanine,dovydas/mezzanine,ryneeverett/mezzanine,wbtuomela/mezzanine,eino-makitalo/mezzanine,ryneeverett/mezzanine,dekomote/mezzanine-modeltranslation-backport,gradel/mezzanine,sjuxax/mezzanine,jerivas/mezzanine,douglaskastle/mezzanine,promil23/mezzanine,frankier/mezzanine,ZeroXn/mezzanine,joshcartme/mezzanine,AlexHill/mezzanine,theclanks/mezzanine,biomassives/mezzanine,fusionbox/mezzanine,molokov/mezzanine,Cicero-Zhao/mezzanine,damnfine/mezzanine,SoLoHiC/mezzanine,webounty/mezzanine,nikolas/mezzanine,jjz/mezzanine,biomassives/mezzanine,dustinrb/mezzanine,fusionbox/mezzanine,biomassives/mezzanine,Cajoline/mezzanine,mush42/mezzanine,emile2016/mezzanine,dsanders11/mezzanine,webounty/mezzanine,spookylukey/mezzanine,christianwgd/mezzanine,tuxinhang1989/mezzanine,tuxinhang1989/mezzanine,emile2016/mezzanine,eino-makitalo/mezzanine,ZeroXn/mezzanine,frankchin/mezzanine,saintbird/mezzanine,damnfine/mezzanine,PegasusWang/mezzanine,mush42/mezzanine,viaregio/mezzanine,frankchin/mezzanine,industrydive/mezzanine,Skytorn86/mezzanine,SoLoHiC/mezzanine,Skytorn86/mezzanine,Cajoline/mezzanine,batpad/mezzanine,nikolas/mezzanine,wyzex/mezzanine,molokov/mezzanine,stephenmcd/mezzanine,cccs-web/mezzanine,dsanders11/mezzanine,industrydive/mezzanine,wbtuomela/mezzanine,industrydive/mezzanine,agepoly/mezzanine,douglaskastle/mezzanine,PegasusWang/mezzanine,damnfine/mezzanine,Kniyl/mezzanine,vladir/mezzanine,saintbird/mezzanine,wyzex/mezzanine,dsanders11/mezzanine,douglaskastle/mezzanine,molokov/mezzanine,frankchin/mezzanine,agepoly/mezzanine,webounty/mezzanine,sjdines/mezzanine,ryneeverett/mezzanine,jjz/mezzanine,eino-makitalo/mezzanine,Kniyl/mezzanine,vladir/mezzanine,promil23/mezzanine,saintbird/mezzanine,promil23/mezzanine,wbtuomela/mezzanine,batpad/mezzanine,gradel/mezzanine,Cajoline/mezzanine,spookylukey/mezzanine,Cicero-Zhao/mezzanine,spookylukey/mezzanine,cccs-web/mezzanine,dustinrb/mezzanine,SoLoHiC/mezzanine,mush42/mezzanine,jjz/mezzanine,wyzex/mezzanine,sjuxax/mezzanine,joshcartme/mezzanine,viaregio/mezzanine,joshcartme/mezzanine,PegasusWang/mezzanine,jerivas/mezzanine,theclanks/mezzanine,adrian-the-git/mezzanine,geodesign/mezzanine,nikolas/mezzanine,geodesign/mezzanine,agepoly/mezzanine,sjdines/mezzanine,sjdines/mezzanine