Time will actually be wasted on an extra right-click. In any case, to plot a route, you first need to left-click.
Here is a version with additional display on right-click, along with the previous Alt+left-click: http://zalil.ru/32977522
Unzip the file and place it in the Data\c folder.
The display on right-click will only work if the last left-click was in that same spot.
This is much better, especially considering that the highlighted phrase is not entirely accurate.
It would be more correct to say: "The display on right-click will only work if the last left-click on the adventure map was in that same spot."
That is, you can click on the minimap, hero icons, city objects, and so on. But blocking movement with Alt would be even better.