[no bug] Fix small padding issue on Fx subnav
[no bug] Fix small padding issue on Fx subnav

craigcook/bedrock,hoosteeno/bedrock,MichaelKohler/bedrock,pascalchevrel/bedrock,sylvestre/bedrock,craigcook/bedrock,hoosteeno/bedrock,sylvestre/bedrock,hoosteeno/bedrock,pascalchevrel/bedrock,schalkneethling/bedrock,kyoshino/bedrock,MichaelKohler/bedrock,sylvestre/bedrock,mkmelin/bedrock,alexgibson/bedrock,ericawright/bedrock,flodolo/bedrock,ericawright/bedrock,sgarrity/bedrock,ericawright/bedrock,craigcook/bedrock,ericawright/bedrock,mkmelin/bedrock,sgarrity/bedrock,schalkneethling/bedrock,sgarrity/bedrock,schalkneethling/bedrock,flodolo/bedrock,alexgibson/bedrock,mkmelin/bedrock,mozilla/bedrock,MichaelKohler/bedrock,mozilla/bedrock,kyoshino/bedrock,craigcook/bedrock,hoosteeno/bedrock,mozilla/bedrock,mkmelin/bedrock,MichaelKohler/bedrock,kyoshino/bedrock,pascalchevrel/bedrock,flodolo/bedrock,sgarrity/bedrock,kyoshino/bedrock,alexgibson/bedrock,mozilla/bedrock,sylvestre/bedrock,pascalchevrel/bedrock,schalkneethling/bedrock,alexgibson/bedrock,flodolo/bedrock