User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 2016021000 Steps to reproduce: I configured multiple (>10) calendar files. I want to set the update frequency to "manual" for all these calendars coming from a local file. Actual results: I'll have to change the properties one by one, because it's not possible to select multiple calendars and change the properties with one dialog. Expected results: Selection of multiple calendars should be possible. Then changing properties of all selected calendars (where useful) should be possible. Candidates could be: color, update interval, notifications, etc.