修复Panel在Area最大化时无法填充满的问题，修改vs-area-wrapper样式

AutoRobot/Windows/Robot/Web/src/DockLayout/Area.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="vs-area-wrapper">
+  <div class="vs-area-wrapper" :class="{ 'is-maximized': isMaximized }">
     <div 
       class="vs-area select-none" 
       :class="{ 'is-maximized': isMaximized, 'is-normal': !isMaximized }" 
@@ -423,4 +423,10 @@ onMounted(() => {
   align-items: center;
   justify-content: center;
 }
+
+/* 最大化状态时，wrapper不居中 */
+.vs-area-wrapper.is-maximized {
+  align-items: stretch;
+  justify-content: stretch;
+}
 </style>