Need settings for multiple monitors

[VadimKulagin]

I use two monitors. The main one is the right monitor, but the converter is displayed only on the left monitor, which is not very convenient.

This can be corrected in several ways:

• recognize the main monitor from OS settings;
• display the converter on the monitor where the cursor or the active window is now;
• set the desired monitor in the extension settings.

Here is the configuration of my system: OS: Ubuntu 18.04 LTS (bionic) GNOME Shell 3.28.1

By the way, thanks for the extension.