Made ``editable`` template tag fail silently if None is given.
Made ``editable`` template tag fail silently if None is given.

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