Specify calendar to synchronize in google calendar sync.

One google account could have few calendars. For example, i have my personal and work events synced in one account: Orange - my work meetings, other colors - personal: image Many sync applications provide ability to choose which calendar you want to sync via dropdown in settings. For now, JIRA Assistant syncs all events, causing too many workload logged in JIRA. It'll be good to implement such functionality in assistants, filtering manually will take too much time everyday.