Picker: perf el-icon-circle-close hover effect

packages/theme-chalk/src/date-picker/picker.scss

@@ -26,6 +26,10 @@
     }
   }
 
+  .el-icon-circle-close {
+    cursor: pointer;
+  }
+
   .el-range__icon {
     font-size: 14px;
     margin-left: -5px;