Bug 1073807 - [2.0 only] Improve smoothness of utility tray
Merge pull request #25146 from etiennesegonzac/bug-1073807-2.0

Bug 1073807 - [2.0 only] Improve smoothness of utility tray r=cwiis
Bug 1050861 - Use version 2.4.1 for tornado in gaia unit tests