fix(Popup): 调整最小高度设定为 26% (#3144)

* fix: popover 无法消失

* fix: 调整最小高度

Author: xiaoyatong

src/packages/popup/popup.scss

@@ -2,7 +2,7 @@
 
 .nut-popup {
   position: fixed;
-  min-height: 46%;
+  min-height: 26%;
   max-height: 100%;
   background-color: $overlay-content-bg-color;
   -webkit-overflow-scrolling: touch;