what's new:
Multi-select indicator & select all
Change mobile layouts & improve the design
bugfixes:
fixed Collapsed mails in the conversation cannot be focused with keyboard
fixed External images are always loaded when replying to a mail
fixed Calendar side menu does not close when selecting "today"
fixed creating contact from email view doesn't work
fixed Templates appear multiple times in list view
fixed Updating calendar event does not properly handle network errors
fixed Long attachment file name not visible