@Finnik - try this one
There should be a new item under Options in PckView's menu: _Bring editor/palette to front_
It is turned off by default. Turning it on allows the SpriteEditor and Palette windows to pop to the front of other app-windows that might be covering those windows, such that focusing the PckView window shall bring both the SpriteEditor and Palette to front, and focusing the SpriteEditor shall bring the Palette to front. But this is a finicky (no pun intended) business in .net ... it behaves differently in win7 and win10, eg.
I haven't found a way, in win10, that allows focus to return properly to the window that initiates the routine. So the _Bring editor/palette to front_ option just turns the routine on/off (ie. bypasses it when OFF).
if you turn the option on and focus does not return properly to the parent window, you'll have to close the child window(s) and turn the option off again.
note that whether the option is on or off, all windows of PckView can be brought to front by minimizing and then restoring PckView per the taskbar ...
Also, the option is saved to PckConfig.yml in the /settings folder
https://github.com/kevL/OpenXCOM.Tools/releases/tag/211103