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The ShortcutSaver plugin provides something close to this, but I would prefer to see the shortcuts pane handle this in the core, and with a better interface (possibly resembling the interface to Abbreviations).
If you want the interface to be improved it is more likely to happen if you open a specific ticket about the interface against the ShortcutSaver plugin. It is unlikely anyone is going to duplicate the functionality of a plugin and add it to core, ever.