Make it easier to annotate tooltip

[JustinPealing]

See Microsoft/sqlopsstudio#2140

There is no annotation tool for Mac that I have found which "freezes" the screen like the windows Zoomit tool does. While I can zoom in on a tooltip, I cannot draw an arrow to it with an annotation tool live, as the tooltip will disappear once I move the mouse. Having a way to "freeze" the tooltip or to highlight something on it with the mouse would be incredibly helpful.