Issue #371375 by Ammaletu, vasike, danflanagan8, KapilV, matt2000, Ryan Palmer, ZeiP, Andrew Answer, Madhu kumar, webchick, Berdir, kwinters, smustgrave, chx, cburschka, Jaza, moshe weitzman, zroger, zoo33, joachim, alexpott, ressa, dasj19, jlscott, quietone, blainelang, wturrell, tanc, MartysMind: Do not allow a module and theme to use the same name