Merge pull request #2792 from fforever14/master

修复当元素初始化时在页面不可见时，元素高度和宽度出错的问题

src/lib/filepicker.js

@@ -91,12 +91,15 @@ define([
         refresh: function() {
             var shimContainer = this.getRuntime().getContainer(),
                 button = this.options.button,
+                /*
                 width = button.outerWidth ?
                         button.outerWidth() : button.width(),
 
                 height = button.outerHeight ?
                         button.outerHeight() : button.height(),
-
+                */
+                width = button[0].offsetWidth || button.outerWidth() || button.width(),
+                height = button[0].offsetHeight || button.outerHeight() || button.height(),
                 pos = button.offset();
 
             width && height && shimContainer.css({