enable "sort document list by project" by default.

this also fixes an inconsistency and renders the tab line on top
when the setting is active (based on the UI property).

Author: mbien

platform/core.multitabs/src/org/netbeans/core/multitabs/impl/TabDataRenderer.java

@@ -59,6 +59,7 @@ public class TabDataRenderer implements TableCellRenderer {
     private static final Color inactiveUnderlineColor = UIManager.getColor("nb.multitabs.inactiveUnderlineColor"); // NOI18N
     private static final Color activeBackground = UIManager.getColor("nb.multitabs.activeBackground"); // NOI18N
     private static final Color hoverBackground = UIManager.getColor("nb.multitabs.hoverBackground"); // NOI18N
+    private static final boolean underlineAtTop = UIManager.getBoolean("EditorTab.underlineAtTop");
 
     private final RendererPanel renderer = new RendererPanel();
     private final List<TabDecorator> decorators = getDecorators();
@@ -238,10 +239,18 @@ public void paint( Graphics g ) {
                 switch (tabsLocation) {
                     default:
                     case JTabbedPane.TOP:
-                        g.fillRect(0, rect.height - underlineHeight, rect.width, underlineHeight);
+                        if (underlineAtTop) {
+                            g.fillRect(0, 0, rect.width, underlineHeight);
+                        } else {
+                            g.fillRect(0, rect.height - underlineHeight, rect.width, underlineHeight);
+                        }
                         break;
                     case JTabbedPane.BOTTOM:
-                        g.fillRect(0, 0, rect.width, underlineHeight);
+                        if (underlineAtTop) {
+                            g.fillRect(0, rect.height - underlineHeight, rect.width, underlineHeight);
+                        } else {
+                            g.fillRect(0, 0, rect.width, underlineHeight);
+                        }
                         break;
                     case JTabbedPane.LEFT:
                         g.fillRect(rect.width - underlineHeight, 0, underlineHeight, rect.height);

platform/core.multitabs/src/org/netbeans/core/multitabs/prefs/SettingsImpl.java

@@ -105,7 +105,7 @@ boolean setSortDocumentListByProject( boolean sort ) {
     }
 
     public boolean isSortDocumentListByProject() {
-        return prefs.getBoolean( PROP_SORT_DOCUMENT_LIST_BY_PROJECT, false );
+        return prefs.getBoolean( PROP_SORT_DOCUMENT_LIST_BY_PROJECT, true );
     }
 
     public boolean isTabRowPerProject() {