DbViewer: added colormap menu option to EditDepthArea, update3dView() updates only last select id to avoid switching to second image after editing the depth of the first one.

guilib/include/rtabmap/gui/DatabaseViewer.h

@@ -200,6 +200,7 @@ private:
 	QMap<int, int> idToIndex_;
 	QList<rtabmap::Link> neighborLinks_;
 	QList<rtabmap::Link> loopLinks_;
+	int lastImageBrowsed_ = 0;
 	rtabmap::DBDriver * dbDriver_;
 	QString pathDatabase_;
 	std::string databaseFileName_;

guilib/include/rtabmap/gui/EditDepthArea.h

@@ -83,6 +83,10 @@ private:
     QAction * removeCluster_;
     QAction * resetChanges_;
     QAction * setPenWidth_;
+    QAction * colorMapWhiteToBlack_;
+	QAction * colorMapBlackToWhite_;
+	QAction * colorMapRedToBlue_;
+	QAction * colorMapBlueToRed_;
 };
 
 }