restore the JOGL/JOAL hooks#1368

Merged

stephengold merged 3 commits intojMonkeyEngine:masterfrom

stephengold:sgold-jogl-hooks

May 8, 2020

Commits on Apr 28, 2020

restore the "hooks" for using JOGL/JOAL instead of LWJGL as the backend
stephengold
committed
clarify the AppSettings javadoc related to JOGL and JOAL
stephengold
committed
clarify some JmeDesktopSystem diagnostics related to JOGL and JOAL
stephengold
committed