[suggestion] disable right mouse click while in LS mode

Please disable, or give the option of disabling, the right click menu while in Landscape mode. While editing landscapes there can be frequent hiccups while the editor catches up, and if you are painting or editing the terrain with right click held down to move the right click menu will often come up and select something from the menu. It’s very annoying. Particularly when it selects focus actor and you have the terrain selected so it zooms all the way out and you lose the spot you were working on. Thanks!