Allow zooming on the block diagram.

[Mustanghipo65]

I think it would be great to allow zooming out on a block diagram. I know we should make all attempts to code on the available window space without scrolling but it's not practical in some situations.

[elset191]

Zoom has been suggested many times.  Here here here and here. I think the last two were more for front panel, but you get the idea.

[Mustanghipo65]

I guess I did the lazy thing and didn't search for it...............