Code review comment for lp://staging/~pkunal-parmar/ubuntu-calendar-app/CalManagement

Tested this branch with the following ppa enabled as requested by renato. https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-proper/+packages

It all seems to work, I had no crashes. The only big issue is performance. With my personal and work calendars enabled the evolution-calendar-factory process was pegging at 100% a lot of the time when navigating from one screen to another.