To solve the conflict of Ctrl+B hotkey, configure the user preference.

In Settings > Advanced Settings Editor > Keyboard Shortcuts > User Preferences, change:

{}

to:

{
    "shortcuts": [
        {
            "command": "application:toggle-left-area",
            "keys": [
                "Accel L"
            ],
            "selector": "body"
        },
        
          {
            "command": "application:toggle-left-area",
            "keys": [
                "Accel B"
            ],
            "selector": "body",
            "disabled": true
        }
    ]
}

References

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