Displaying tab lines for EXWM buffers

[ErikPrantare]

When using tab-line-mode, the X window overlaps with the tab line. This issue has been described here: ch11ng/exwm#788

The workaround in that thread works. The source of the issue seems to lie in window-inside-absolute-pixel-edges not taking into account the tab line. I am not well versed enough in the display system to determine whether this is a bug in Emacs or EXWM. If this is a bug in Emacs, I can open an issue there instead.