* customizeCSS: client dialog

* remove hardcoded width from most dialogs (move to css)
* add helper to easily get dialog from its widget
* rework some dialog buttons to use current object instead of calling dialog by name

themes/light/dijit_basic.less

@@ -167,4 +167,8 @@
 		}
 	}
 
+	.dijitDialog {
+		width : 600px;
+	}
+
 }