[FR] Add Zen icon to palette command

[danieltomasz]

I am using Commander to launching Zen directly from Tab Bar (command "Zen: Toggle"); As Zen doesn't have icon associated with command palette, I am using a custom icon, but commander doesnt have "focus" related icon so it doesnt look great.

When Zen have include icon in command palette, it will appear automatically in pinned commander, giving me nicer and more coherent look of my tab bar

My current look:

I am using Anchor to indicate Zen: toggle