if we are told to clear the octree, disable physics until we have (re)loaded entities

interface/src/Application.cpp

@@ -3877,6 +3877,8 @@ void Application::clearDomainOctreeDetails() {
     qCDebug(interfaceapp) << "Clearing domain octree details...";
     // reset the environment so that we don't erroneously end up with multiple
 
+    _physicsEnabled = false;
+
     // reset our node to stats and node to jurisdiction maps... since these must be changing...
     _entityServerJurisdictions.withWriteLock([&] {
         _entityServerJurisdictions.clear();