MacOS support overhaul, Apple M1 and breaking changes

[RiccardoBlb]

Community Poll: Keep or Drop SettingsDialog and ErrorDialog in future versions of the engine

After the discussion happened here: MacOS support overhaul, Apple M1 and breaking changes We didn’t manage to agree on whether to keep or drop these two dialogs. So, here is a poll for the community to vote. poll What will change If voted to keep, things will stay as they are now. If voted to drop: the SettingsDialog will be removed from the internal code the ErrorDialog will be replaced by a callback JmeSystem.setErrorMessageHandler((message)->{ /* */ }); that will output to console std…