v1.5.4 Beta rolling

Bunch on new code that cleans work from previous pull requests that were "mergeable". I couldn't get in deep on the on_the_record / off_the_record

Notable changes:

• Underlying fix for "Google Couldn't sign you in Yakyak"
• Hides archived conversations
• Add 'Show image preview' (feature #620) -- pull request #1096
  • only for previewing sent links (not for images shared via hangouts)
• Corrects a problem when deleting conversations
• New conversation menu
• When adding users to a conversation it shows the email when hovering the avatar
• Should correct a notification problem in Windows 10
• Should correct an auto-launch bug on macOS
• Bunch on updates on packages that will provide with better security and hopefully same functionality
• fix mapping to 💩
• adds languages
  • Telugu
  • Breton
  • Simplified chinese
  • Remaning Czech string
• Moved my name to the "Main authors", because of Ego

Maybe some others... Didn't track everything ¯\_(ツ)_/¯

This is a testing version built from current most updated code.

It is overwritten as new pull requests are accepted,

It shouldnt be used for publishing packages. Only for testing.