Visual Blockwise Mode

Hello,

What is the correct way to get toggleVisualMode, blockwise:true to work?  I can't seem to get the syntax in the Brackets.json file to make it happen.  I'd be fine using Alt-v, so the C-v paste wouldn't be overridden, or some other keymapping, even, but I can't seem to get Vimderbar to recognize the block visual mode part.

Thanks,

Mark
