[Fix bug 1276614] Use same height for header
[Fix bug 1276614] Use same height for header

fxa90id/mozillians,fxa90id/mozillians,akatsoulas/mozillians,mozilla/mozillians,johngian/mozillians,akatsoulas/mozillians,johngian/mozillians,fxa90id/mozillians,akatsoulas/mozillians,akatsoulas/mozillians,fxa90id/mozillians,johngian/mozillians,johngian/mozillians,mozilla/mozillians,mozilla/mozillians,mozilla/mozillians