Password fields: Add option to unmask input and add caps-lock warning

Author: tferr

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

@@ -103,6 +103,7 @@ public void set(final WidgetModel model) {
 		}
 		else if (model.isStyle(TextWidget.PASSWORD_STYLE)) {
 			textComponent = new JPasswordField("", columns);
+			textComponent.putClientProperty(FlatClientProperties.STYLE, "showRevealButton: true; showCapsLock: true");
 		}
 		else {
 			textComponent = new JTextField("", columns);