gui: fixed wrongly showing landmark rejected when it was not (because a loop closure was rejected at the same time)

corelib/src/Rtabmap.cpp

@@ -2907,6 +2907,7 @@ bool Rtabmap::process(
 				{
 					UINFO("Landmark %d observed again! Seen the first time by node %d.", -iter->first, *_memory->getLandmarksIndex().find(iter->first)->second.begin());
 					landmarksDetected.insert(std::make_pair(iter->first, _memory->getLandmarksIndex().find(iter->first)->second));
+					rejectedGlobalLoopClosure = false; // If it was true, it will be set back to false if landmarks are rejected on graph optimization
 				}
 			}
 		}

guilib/src/MainWindow.cpp

@@ -2103,6 +2103,7 @@ void MainWindow::processStats(const rtabmap::Statistics & stat)
 				}
 				else if(landmarkId!=0)
 				{
+					highestHypothesisId = landmarkNodeRef;
 					if(rejectedHyp)
 					{
 						show = _preferencesDialog->imageRejectedShown();