Release 3.3.0-beta.4

• Remember window sized and their location after the app closed.
• Open links in an existing window, if it exists, for calls from the same channel. Works with web-client >= 2.16.0.
• Added allowPrerelease variable to configure the auto-update channel.
• Prevent from clicking "Check for updates..." button in the menu, when an update already in progress.
• Added French and Italian languages.