Add TGXL to the panels on the right side of SSDR

Let's hope, when and if this will be implemented, that there will be a way to turn PGXL and TGXL panels off. I don't want them to clutter my screen when I don't have them. This of course goes for both Maestro and SSDR.

You may already know this but I should also add that the panes are not limited to be just on the right side. They can be moved to the left side by simply clicking and holding left mouse button in the area in the top bar (blue circle), and dragging to the whole window to the left side. Alternately the whole pane window can be moved to a separate window outside of SmartSDR or even to a different monitor. By clicking on the arrow (red circle), this shifts the whole pane window outside of SmartSDR then you can drag the window to a different monitor.