[Help Wanted] dont konw how to bind `closeMarkersNavigation`

Is this a BUG REPORT or FEATURE REQUEST? (choose one):

What happened: a specified key-binding not working

What did you expect to happen: close marker popup with my shortcut

How to reproduce it (as minimally and precisely as possible):

Environment:

• Extension (VsCodeVim) version: 0.11.0
• VSCode version: 1.20.1
• OS version: macOS High Sierra 10.13.3

I create some mapping for non-edit mode to navigation lint errors.

     "vim.leader": "<space>",
    "vim.otherModesKeyBindingsNonRecursive": [
        {
            "before": [
                "<leader>",
                "e",
                "n"
            ],
            "commands": [
                {
                    "command": "editor.action.marker.next"
                }
            ]
        },
        {
            "before": [
                "<leader>",
                "e",
                "p"
            ],
            "commands": [
                {
                    "command": "editor.action.marker.prev"
                }
            ]
        },
        {
            // not working
            "before": [
                "<leader>",
                "e",
                "c"
            ],
            "commands": [
                {
                    "command": "closeMarkersNavigation"
                }
            ]
        }
    ],

The prev and next binding works good. But closeMarkersNavigation do nothing while marker popup can be closed by pressing shift+escape which is default key-binding of vscode:

I try change command to editor.action.closeMarkersNavigation and workbench.closeMarkersNavigation, both failed too.

No repository file or test is named. Start by comparing VS Code's default Shift+Escape keybinding with the command identifiers accepted by vim.otherModesKeyBindingsNonRecursive, then inspect how VSCodeVim forwards those commands. Done means a configured mapping closes the marker popup using the correct command identifier.