Hovering top right button when maximized

[lucasjome]

When a window is maximized, I can't hover over the close button if I move the mouse cursor to the top corner of the screen.
But with Breeze's window decoration, it's possible and also super useful.

It's somehow a bug or the intended way of working?

[varlesh]

This implemented as GTK version 4px offset button from up & right.
GTK:

Qt:

[varlesh]

You can use custom settings for buttons on rc-file.
For example set 0 px offset on Materia-Darkrc:

TitleEdgeTopMaximized=0
TitleEdgeLeftMaximized=0
TitleEdgeRightMaximized=0

Restart KWin:
killall -9 kwin_x11
Run KWin on Krunner ALT+F2
kwin_x11

Result: