[small visual issue] Make the background the same everywhere

[EDM115]

This issue will probably affect no one except me
When using 3rd-party programs that allows transparency of windows (here MicaForEveryone), we can see that the effect is cast to the main parts of the window, text fields, contour of buttons, ...
But I wonder if it's possible to view it on the whole window 👀

Screenshots :

[database64128]

youtube-dl-wpf uses MaterialDesignThemes unmodified. You'd have better luck getting this resolved by opening an issue at MicaForEveryone about the problems with WPF apps that use MaterialDesignThemes.