Fix webclient prompt (issue #950)

evennia/web/webclient/static/webclient/css/webclient.css

@@ -165,6 +165,7 @@ div {margin:0px;}
 /* prompt area above input field */
 #prompt {
     margin-top: 10px;
+    padding: 0 .45em;
 }
 
 /* No javascript warning */

evennia/web/webclient/static/webclient/js/webclient_gui.js

@@ -190,8 +190,10 @@ function onText(args, kwargs) {
 // Handle prompt output from the server
 function onPrompt(args, kwargs) {
     // show prompt
-    $('#prompt').replaceWith(
-           "<div id='prompt'>" + args[0] + "</div>");
+    $('#prompt')
+        .addClass("msg out")
+        .html(args[0]);
+    doWindowResize();
 }
 
 // Silences events we don't do anything with.