ui: add PVE.menu.Item

Extend 'Ext.menu.Item' with a simplified handler logic also used in
'PVE.button.Button'.

If 'confirmMsg' config is set we wrap the defined handler in a
confirm dialog, useful if the menu item just makes an API call and
does not has an own (edit) window shown.

In contrast to the 'pveButton' we do not have a selection model,
enable function and the respective logic here.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Acked-by: Dominik Csapak <d.csapak@proxmox.com>

www/manager6/Makefile

@@ -6,6 +6,7 @@ JSSRC= 				                 	\
 	Parser.js					\
 	StateProvider.js				\
 	button/Button.js				\
+	menu/MenuItem.js				\
 	button/ConsoleButton.js				\
 	button/Split.js					\
 	button/HelpButton.js				\

www/manager6/menu/MenuItem.js

@@ -0,0 +1,46 @@
+Ext.define('PVE.menu.Item', {
+    extend: 'Ext.menu.Item',
+    alias: 'widget.pveMenuItem',
+
+    // set to wrap the handler callback in a confirm dialog  showing this text
+    confirmMsg: false,
+
+    // set to focus 'No' instead of 'Yes' button and show a warning symbol
+    dangerous: false,
+
+    initComponent: function() {
+        var me = this;
+
+	if (me.handler) {
+	    me.setHandler(me.handler, me.scope);
+	}
+
+	me.callParent();
+    },
+
+    setHandler: function(fn, scope) {
+	var me = this;
+	me.scope = scope;
+	me.handler = function(button, e) {
+	    var rec, msg;
+	    if (me.confirmMsg) {
+		msg = me.confirmMsg;
+		Ext.MessageBox.defaultButton = me.dangerous ? 2 : 1;
+		Ext.Msg.show({
+		    title: gettext('Confirm'),
+		    icon: me.dangerous ? Ext.Msg.WARNING : Ext.Msg.QUESTION,
+		    msg: msg,
+		    buttons: Ext.Msg.YESNO,
+		    defaultFocus: me.dangerous ? 'no' : 'yes',
+		    callback: function(btn) {
+			if (btn === 'yes') {
+			    Ext.callback(fn, me.scope, [me, e], 0, me);
+			}
+		    }
+		});
+	    } else {
+		Ext.callback(fn, me.scope, [me, e], 0, me);
+	    }
+	};
+    }
+});