Revert https://git.suckless.org/dmenu/commit/377bd37e212b1ec4c03a481245603c6560d0be22.html

Upstream has reverted it after v4.9 in https://git.suckless.org/dmenu/commit/db6093f6ec1bb884f7540f2512935b5254750b30.html
--- a/dmenu.c
+++ b/dmenu.c
@@ -552,7 +552,7 @@ run(void)
 	XEvent ev;
 
 	while (!XNextEvent(dpy, &ev)) {
-		if (XFilterEvent(&ev, None))
+		if (XFilterEvent(&ev, win))
 			continue;
 		switch(ev.type) {
 		case Expose:
@@ -664,7 +664,6 @@ setup(void)
 	                XNClientWindow, win, XNFocusWindow, win, NULL);
 
 	XMapRaised(dpy, win);
-	XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
 	if (embed) {
 		XSelectInput(dpy, parentwin, FocusChangeMask);
 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
@@ -730,8 +729,6 @@ main(int argc, char *argv[])
 
 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 		fputs("warning: no locale support\n", stderr);
-	if (!XSetLocaleModifiers(""))
-		fputs("warning: no locale modifiers support\n", stderr);
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("cannot open display");
 	screen = DefaultScreen(dpy);