SwingColorWidget: Do not use harwired height

Define height relative to font size currently in use. This ensures it adopts the same height as other widgets in hiDPI screens

Author: tferr

src/main/java/org/scijava/ui/swing/widget/SwingColorWidget.java

@@ -46,6 +46,7 @@
 import javax.swing.JColorChooser;
 import javax.swing.JDialog;
 import javax.swing.JPanel;
+import javax.swing.UIManager;
 import javax.swing.colorchooser.AbstractColorChooserPanel;
 
 import org.scijava.plugin.Plugin;
@@ -66,7 +67,7 @@ public class SwingColorWidget extends SwingInputWidget<ColorRGB> implements
 	ActionListener, ColorWidget<JPanel>
 {
 
-	private static final int SWATCH_WIDTH = 64, SWATCH_HEIGHT = 16;
+	private static final int SWATCH_WIDTH = 64, SWATCH_HEIGHT = widgetHeight();
 
 	private static final String HSB_CLASS_NAME =
 		"javax.swing.colorchooser.DefaultHSBChooserPanel";
@@ -211,6 +212,15 @@ private int value(final Object o) {
 		return chooser;
 	}
 
+	private static int widgetHeight() {
+		try {
+			return UIManager.getFont("TextField.font").getSize();
+		} catch (final Exception ignored) {
+			// do nothing
+		}
+		return 16;
+	}
+
 	// -- AbstractUIInputWidget methods ---
 
 	@Override