Focus handling with floating windows

[vv3]

There seems to be a conflict/problem with EXWM and the native
mouse/focus handling in emacs, especially related to popup/floating
windows. The settings mouse-autoselect-window and
focus-follows-mouse is used by emacs to control mouse/focus
handling in emacs. But setting these to true seems to give unexpected
results in EXWM with some graphical (X11) applications using popups/floating
windows.

A concrete example is FreeCAD and the popup dialogs related to the
VarSet dialog, and therein editing the "Value" field which brings up
yet another popup. The mouse pointer and focus seems to end up in unexpected
places in this case.

Looking at the function select-frame-set-input-focus it
seems that setting focus-follows-mouse to true makes emacs
try to warp the mouse position to character positions within the
frame. This surely makes no sense in graphical X11 applications.

See also notes in: https://sqrtminusone.xyz/posts/2022-01-03-exwm/

Trying to unset these variables for floating windows only, in the
exwm-float-setup-hook does not work, because the hook seems
to be called too late. Adding an additonal call at the start of
exwm-floating--set-floating seems to work, though:

(defun my/fix-exwm-floating-windows ()
  (setq-local exwm-workspace-warp-cursor nil)
  (setq-local mouse-autoselect-window nil)
  (setq-local focus-follows-mouse nil))
(add-hook 'exwm-floating-pre-setup-hook #'my/fix-exwm-floating-windows)

main...vv3:exwm:floating-focus-fix