日历部件：年月选择下拉样式调整

src/components/app-calendar/browser-style.css

@@ -253,7 +253,6 @@
     text-align:center;
     color:#999;
     width: 20%;
-    float: left;
     text-align: center;
     border-radius: 40px;
     box-sizing: border-box;
@@ -273,7 +272,7 @@
     margin-top: 0px;
 }
 .calendar-years, .calendar-months{
-    height: 50%;
+    height: auto;
     width: 100%;
     padding: 10px;
     box-sizing: border-box;