Fix unintentional compose window resize (#1489114)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix unintentional compose window resize (#1489114)
 - Fix performance regression in text wrapping function (#1489133)
 - Fix connection to posgtres db using unix socket (#1489132)
 - Implemented shared cache (rcube_cache_shared)

program/js/app.js

@@ -2974,6 +2974,7 @@ function rcube_webmail()
     }
     else {
       this.redirect(url);
+      if (this.env.extwin)
         window.resizeTo(Math.max(this.env.popup_width, $(window).width()), $(window).height() + 24);
     }
   };