import jalview.util.MessageManager;
import jalview.util.Platform;
import jalview.viewmodel.AlignmentViewport;
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import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;
+
/**
* An internal frame on the desktop that hosts a horizontally split view of
* linked DNA and Protein alignments. Additional views can be created in linked