Editor does not use Undo keybinding

[mstrobel]

If the IDE's "Undo" keybinding is set to anything other than the system default, it doesn't work properly in the "Markdown Editor" tab. For example, I have Undo mapped to "Ctrl+Z" on my Mac; the editor recognizes "⌘+Z", but not "Ctrl+Z".

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如果 IDE 的“撤消”键绑定设置为系统默认以外的任何值，它将无法在 Markdown 编辑器选项卡中正常工作。例如，我在 Mac 上将“撤消”键映射到 Ctrl+Z；编辑器可以识别 ⌘+Z，但无法识别 Ctrl+Z。