Show update notification at application start when connecting to the VPN

[gorkapernas]

Description:

Currently, the update notification is shown in the following scenarios:

• 5 seconds after UI starts
• when a user manually clicks "Check For Updates"
• Automatically every 12 hours

However, on Windows, at application start, if there is not connectivity such as when the user has enabled "Always-on Firewall", the update notification doesn't show up, not even when the app connects to the VPN and the connectivity is reestablished.

This has been mainly observed on Windows, on macOS works as expected, the update notification is shown when the app connects to the VPN.

Expected:

Therefore, It is suggested to show the update notification at application start ALSO when the user reestablishes the connection by connecting to the VPN.

Environment:

IVPN: 3.3.10 Platform: Windows 10

[stenya]

This can be related to https://github.com/ivpn/desktop-app/issues/10