Fix next message display after removing a message (#1489800)

CHANGELOG

@@ -21,6 +21,7 @@ CHANGELOG Roundcube Webmail
 - Fix XSS issue in plain text spellchecker (#1489806)
 - Fix invalid page title for some folders (1489804)
 - Fix redundant alert message on over-size uploads (#1489817)
+- Fix next message display after removing a message (#1489800)
 
 RELEASE 1.0.0
 -------------

program/js/common.js

@@ -330,13 +330,17 @@ removeEventListener: function(evt, func, obj)
 triggerEvent: function(evt, e)
 {
   var ret, h;
+
   if (e === undefined)
     e = this;
   else if (typeof e === 'object')
     e.event = evt;
 
-  if (this._events && this._events[evt] && !this._event_exec) {
+  if (!this._event_exec)
-    this._event_exec = true;
+    this._event_exec = {};
+
+  if (this._events && this._events[evt] && !this._event_exec[evt]) {
+    this._event_exec[evt] = true;
     for (var i=0; i < this._events[evt].length; i++) {
       if ((h = this._events[evt][i])) {
         if (typeof h.func === 'function')
@@ -359,7 +363,8 @@ triggerEvent: function(evt, e)
     }
   }
 
-  this._event_exec = false;
+  delete this._event_exec[evt];
+
   if (e.event) {
     try {
       delete e.event;