Table Collaboration

This API is likely to change at some point.

You can activate a dedicated collaboration button in the statusbar.

```
var popup = ts.ui.Notification;
ts.ui.get('#table1', table => {
	table.collabbutton(function onclick() {
		popup.success('Go collaborate!');
	}).cols(['A', 'B', 'C', 'D']).rows([
		[1, 4, 7, 10],
		[2, 5, 8, 11],
		[3, 6, 9, 12]
	])
});
```

The button triggers a callback, but there is no default behavior associated. The API to initialize and resume a Collaboration thread will be defined elsewhere. When you are done with the button, you can hide it again.

ts.ui.get('#table1').collabbutton(null);