Protect mouse pointer when pointer_follows_focus set
Protect mouse pointer when pointer_follows_focus set

When dialog window shows, I cannot move pointer outside this dialog window
because when I move it, it jumps in window's center (again on dialog).
So, this commit disables pff when mouse focus event happen and enables
after.

nfnty/bspwm,Stebalien/bspwm,0re5ama/bspwm,netzverweigerer/bspwm,0re5ama/bspwm,medisun/bspwm,ikn/bspwm,nfnty/bspwm,0re5ama/bspwm,jbalint/bspwm,ikn/bspwm,baskerville/bspwm,JBouron/bspwm,jbalint/bspwm,Stebalien/bspwm,XiKuuKy/bspwm,XiKuuKy/bspwm,JBouron/bspwm,netzverweigerer/bspwm,JBouron/bspwm,baskerville/bspwm,jbalint/bspwm,nfnty/bspwm,medisun/bspwm,medisun/bspwm