TabbedPane: completed review of PR #343 (active tab border painting style)

- replaced `activeTabBorder` with `tabType`
- added `TabbedPane.cardTabSelectionHeight`

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java

@@ -363,6 +363,29 @@ public class FlatTabbedPane
 	}
 
 
+	// NOTE: enum names must be equal to allowed strings
+	/** @since 2 */ public enum TabType { underlined, card };
+
+	/**
+	 * Returns type of selected tab.
+	 *
+	 * @since 2
+	 */
+	public TabType getTabType() {
+		return getClientPropertyEnumString( TABBED_PANE_TAB_TYPE, TabType.class,
+			"TabbedPane.tabType", TabType.underlined );
+	}
+
+	/**
+	 * Specifies type of selected tab.
+	 *
+	 * @since 2
+	 */
+	public void setTabType( TabType tabType ) {
+		putClientPropertyEnumString( TABBED_PANE_TAB_TYPE, tabType );
+	}
+
+
 	// NOTE: enum names must be equal to allowed strings
 	public enum TabsPopupPolicy { never, asNeeded };