fix special folder creation and race condition for dropdown; PATRIC3/patric3_website#1677
fix special folder creation and race condition for dropdown; PATRIC3/patric3_website#1677

nconrad/p3_web,maovt/p3_web,hyoo/p3_web,dawenx/p3_web,PATRIC3/p3_web,dmachi/p3_web,nconrad/p3_web,aswarren/p3_web,zreyn/p3_web,dawenx/p3_web,hyoo/p3_web,hyoo/p3_web,aswarren/p3_web,aswarren/p3_web,PATRIC3/p3_web,maovt/p3_web,maovt/p3_web,nconrad/p3_web,dawenx/p3_web,dmachi/p3_web,zreyn/p3_web,maovt/p3_web,aswarren/p3_web,dawenx/p3_web,PATRIC3/p3_web,dmachi/p3_web,nconrad/p3_web,zreyn/p3_web,dmachi/p3_web,PATRIC3/p3_web,hyoo/p3_web,zreyn/p3_web