此标题会在视窗内部，以粗体文字行显示于工具提示控制项说明的标准文字上方。
The title is displayed within the window as a line of bold text above the standard text of a ToolTip control description.
与此同时，添加一个新 CSS 声明以控制工具提示内容的宽度，从而不需要再用到滚动条。
While you're at it, add a new CSS declaration to control the width of the tooltip content so it doesn't end up with a scrollbar.
固定工具提示显示不正确的钥匙控制器。
Fixed tooltips not displaying the correct keys for controllers.
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