[TxMt] feature: floating cheat sheet

[Matthew Johnson]

> You could always use  Bundles -> Textmate -> Show Keyboard  
> Shortcuts or press Cmd+Alt+Ctrl+K and then you get a functional  
> window with your required info.

This is a nice feature, but what would be really great is a window  
like the Go to File and Go to Symbol symbol windows for Execute  
Command that would present a list of commands allowed in the current  
scope.  This would be a nice alternate way to invoke commands  
especially while learning a new bundle.

Matthew