chenhaodong / mew-iview

fixed https://github.com/iview/iview/issues/3298

add props input-size

表单布局中包含slider时，input 样式无法统一。或者考虑 允许 `showInput` 的值为 `String`。控制input的size。

fix Slider not emit on-change event when click bar at first time

Add new props 'childrenKey' to Tree component

 采用inject方法，修正问题：当FormItem组件在slot里时，无法正确获取form组件

fix #3195

采用 findComponentUpward 替代 this.$parent.$parent.$parent 获取 Dropdown 父节点组件

fix select dropdown position

Fix a confliction in Input component

Fixed issue #2931

Fix clearable and icon conflict while `clearable` and `icon` options are used. `clearable` should show when this option is enable and the currentValue is not empty, otherwise the `icon` will never be shown.

Card组件增加title和icon属性，简化用户使用