Send out less active/inactive chat state messages.

Don't send out 'active' and 'inactive' chat state messages on blur and focus of chat box.
These events happen too often, causing lots of unnecessary messages.

converse.js

@@ -1191,8 +1191,6 @@
                 'click .close-chatbox-button': 'close',
                 'click .toggle-chatbox-button': 'minimize',
                 'keypress textarea.chat-textarea': 'keyPressed',
-                'focus textarea.chat-textarea': 'chatBoxFocused',
-                'blur textarea.chat-textarea': 'chatBoxBlurred',
                 'click .toggle-smiley': 'toggleEmoticonMenu',
                 'click .toggle-smiley ul li': 'insertEmoticon',
                 'click .toggle-clear': 'clearMessages',
@@ -1498,16 +1496,6 @@
                 }
             },
 
-            chatBoxFocused: function (ev) {
-                ev.preventDefault();
-                this.setChatState(ACTIVE);
-            },
-
-            chatBoxBlurred: function (ev) {
-                ev.preventDefault();
-                this.setChatState(INACTIVE);
-            },
-
             onDragResizeStart: function (ev) {
                 if (!converse.allow_dragresize) { return true; }
                 // Record element attributes for mouseMove().