bugfixes:
fixed Deleting calendar event in the event popup does not close the popup
fixed Whitelabel colors are not available on native clients
fixed PDF invoices do not render special characters
fixed Leaving survey images are embedded into Icons.ts
fixed Icons in mail actions bar do not have tooltip on hover
fixed No navigation buttons in calendar view
fixed downgrading with contact list throws error
fixed Sharing a video on iOS triggers vCard import pop-up
fixed setting negative reminder times in calendar
fixed In calendar navigation to next month via month picker only navigates to previous month