fix: optimize the style of MenuBar (#629)

Author: kiwiwong

src/components/menu/style.scss

@@ -50,7 +50,7 @@
         min-width: 120px;
 
         &:hover {
-            background-color: var(--button-background);
+            background-color: var(--menu-selectionBackground);
             color: var(--button-foreground);
         }
 

src/extensions/locales-defaults/locales/zh-CN.json

@@ -19,7 +19,7 @@
         "menu.copyLineUp": "向上拷贝",
         "menu.view": "视图",
         "menu.commandPalette": "命令面板",
-        "menu.openView": "打开试图",
+        "menu.openView": "打开视图",
         "menu.appearance": "外观",
         "menu.showMenuBar": "显示菜单栏",
         "menu.showSideBar": "显示边栏",

src/workbench/menuBar/style.scss

@@ -33,16 +33,17 @@
 
     &--horizontal {
         align-items: center;
-        background: var(--activityBar-background);
+        background-color: var(--activityBar-background);
         display: flex;
         height: 30px;
         justify-content: center;
         width: 100%;
 
         > #{$menu} {
-            background: var(--activityBar-background);
+            background-color: inherit;
             box-shadow: none;
             color: var(--foreground);
+            height: 100%;
 
             &--horizontal {
                 #{$menu}__item {