run scripts from tree view...

hi,
i've just added the following lines to init.coffee:

```
# https://atom.io/docs/api/v1.0.7/ContextMenuManager
atom.contextMenu.add {
'atom-workspace': [
{
label: 'Script',
submenu: [
{label: 'Run', command:'script:run'},
{label: 'Kill', command:'script:kill-process'}
]
}
]
}
```

but if i right click on a file in the tree view and select Script -> Run, it runs the script in the editor active tab...