Fix project container wrapping on /platform
Fix project container wrapping on /platform

Prior to this commit, project containers on the /platform page wrapped
incorrectly on Firefox. This change adds a Gecko-specific CSS rule[1] to
prevent this behavior.

Changes are based on pull request #66.

[1]: http://stackoverflow.com/questions/3123063/what-does-moz-document-url-prefix-do

seoilhyun/sagan,dkushner/sagan,dharmaraju/sagan,gregturn/sagan,vizewang/sagan,martinlippert/sagan,dlizarra/sagan,dkushner/sagan,garylgh/sagan,eonezhang/sagan,dharmaraju/sagan,dharmaraju/sagan,TabberGit/sagan,martinlippert/sagan,martinlippert/sagan,dsyer/sagan,lowtalker/sagan,vizewang/sagan,BHASKARSDEN277GITHUB/sagan,vizewang/sagan,TabberGit/sagan,spring-io/sagan,eonezhang/sagan,amit-siddhu/sagan,BHASKARSDEN277GITHUB/sagan,dvaughn555/sagan,amit-siddhu/sagan,mbateman/sagan,dvaughn555/sagan,amit-siddhu/sagan,gregturn/sagan,rwinch/sagan,dsyer/sagan,spring-io/sagan,lowtalker/sagan,seoilhyun/sagan,andriykonoz/sagan,eonezhang/sagan,seoilhyun/sagan,garylgh/sagan,eonezhang/sagan,BHASKARSDEN277GITHUB/sagan,dvaughn555/sagan,dlizarra/sagan,yhj630520/sagan,dsyer/sagan,mbateman/sagan,seoilhyun/sagan,garylgh/sagan,yhj630520/sagan,dlizarra/sagan,dkushner/sagan,dsyer/sagan,andriykonoz/sagan,garylgh/sagan,dharmaraju/sagan,TabberGit/sagan,lowtalker/sagan,mbateman/sagan,amit-siddhu/sagan,lowtalker/sagan,rwinch/sagan,andriykonoz/sagan,andriykonoz/sagan,yhj630520/sagan,dvaughn555/sagan,dkushner/sagan,BHASKARSDEN277GITHUB/sagan,vizewang/sagan,spring-io/sagan,rwinch/sagan,TabberGit/sagan,yhj630520/sagan,martinlippert/sagan,spring-io/sagan,mbateman/sagan,rwinch/sagan,dlizarra/sagan,gregturn/sagan