Opening second instance blocks closing of the window due to popup

[HumbleDeer]

Describe the issue

When opening a second instance of the same Windows Raptoreum Core wallet, an error is produced in a popup window.
Trying to close the second instance using the taskbar icon (right click > Close window) refuses to close the application until the error popup is closed.
However, this window is not part of the "open windows" in the taskbar, so if it gets lost or covered up, it cannot be closed.

Expected behaviour

The wallet should automatically close the popup window when the loading window with the logo is closed and/or make the popup window one of the addressable windows in the taskbar. Alternatively, the popup window may be brought to the front and an alert played to the user instead, both forcing the user to close the popup window as well as giving the user the ability to find/close it.

Actual behaviour

If the popup window disappears under another window or another window is opened ontop, it cannot be found and will prevent the wallet from being closed from the taskbar.

What version of Raptoreum Core are you using?

Raptoreum Core version v2.0.03.01-unk

Machine specs:

• OS: Microsoft Windows 11 Pro Version 10.0.22621 Build 22621

Any extra information that might be useful in the debugging process.

The same issue/phenomenon can be observed with any other popup window in the Windows Raptoreum Core wallet, both in regards to closing the wallet as well as the popup window not showing up in the taskbar. (Figure 1)

Screenshots

Figure 1