* add settting to disable markdown keymap
Signed-off-by: d0zingcat <leewtang@gmail.com>

* rename disable markdown shortcuts
Signed-off-by: d0zingcat <leewtang@gmail.com>

* fix lint
Signed-off-by: d0zingcat <leewtang@gmail.com>

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Signed-off-by: d0zingcat <leewtang@gmail.com>