fix keyboard lockup on client initiated unmap event, tweak desktop switching and monitor refresh

client.c

@@ -109,8 +109,7 @@ void nofocus(void) {
   static Window w = 0;
   int mask;
   XSetWindowAttributes attr;
-  Client* c;
-
+  /*Client* c;
   if (current) {
     setactive(current, 0);
     for (c = current->revert; c; c = c->revert)
@@ -119,9 +118,8 @@ void nofocus(void) {
         return;
       }
     cmapnofocus(current->screen);
-    /* if no candidates to revert to, fall through */
   }
-  current = 0;
+  current = 0;*/
   if (w == 0) {
     mask = CWOverrideRedirect /*|CWColormap*/;
     attr.override_redirect = 1;

event.c

@@ -49,6 +49,7 @@ void mainloop(int shape_event) {
             break;
           }
           for (c = clients; c; c = c->next) {
+            monitor = getmonitorbyclient(c);
             wrangle(c, monitorinfo[monitor]);
           }
         }
@@ -272,6 +273,7 @@ void unmap(XUnmapEvent* e) {
         break;
       case NormalState:
         if (c == current) {
+          nofocus();
           if (revertc = getclient(getrevert(c), 0)) {
             top(revertc);
             active(revertc);

menu.c

@@ -513,9 +513,12 @@ void switch_to(int n) {
   switch_to_c(n, clients);
 
   current = currents[virt];
-  ensureactive();
-  active(current);
-  top(current);
+  if (current) {
+    active(current);
+    top(current);
+  } else {
+    nofocus();
+  }
 
 #ifdef VIRTNOTIFY
   sprintf(virtmsg, VIRTMSG, b2items[virt]);