timeline: Fixed the "Today" and "Yesterday" labels in the timeline for non-GMT timezones.
timeline: Fixed the "Today" and "Yesterday" labels in the timeline for non-GMT timezones.

Patch by jomae. Closes #9386.


git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@9799 af82e41b-90c4-0310-8c96-b1721e28e2e2

exocad/exotrac,dafrito/trac-mirror,exocad/exotrac,dafrito/trac-mirror,moreati/trac-gitsvn,exocad/exotrac,moreati/trac-gitsvn,dafrito/trac-mirror,moreati/trac-gitsvn,dafrito/trac-mirror,moreati/trac-gitsvn,exocad/exotrac