Update dialog doesn't accept input if main window is minimized

[codinglikejesus]

Describe the bug

When Fan Control prompts for an update, if the main window is minimized, the update window doesn't take input (e.g. clicking the button to update). Once the main window is brought back, the update window works again and takes input.

[brutlern]

I can confirm this as well. It's a minor issue though, more of a nitpick really.