DiskUsage: TabView flush to window border

http://postimg.org/image/izae7h1qd/

src/apps/diskusage/ControlsView.cpp

@@ -138,6 +138,7 @@ ControlsView::VolumeTabView::VolumeTabView()
 	:
 	BTabView("volume_tabs", B_WIDTH_FROM_LABEL)
 {
+	SetBorder(B_NO_BORDER);
 }
 
 

src/apps/diskusage/MainWindow.cpp

@@ -35,7 +35,7 @@ MainWindow::MainWindow(BRect pieRect)
 
 	AddChild(BLayoutBuilder::Group<>(B_VERTICAL)
 		.Add(fControlsView)
-		.SetInsets(5, 5, 5, 5)
+		.SetInsets(0, B_USE_WINDOW_INSETS, 0, 0)
 	);
 	float maxHeight = BScreen(this).Frame().Height() - 12;
 	fControlsView->SetExplicitMaxSize(BSize(maxHeight, maxHeight));