Stop using deprecated AbstractUIPlugin.getDialogSettings()

Stop using deprecated AbstractUIPlugin.getDialogSettings() and correct
the javadoc.

Change-Id: I6c67993cff6f60359b5c6af128cd88e92ac1c46c
Signed-off-by: Alexander Fedorov <alexander.fedorov@arsysop.ru>
diff --git a/org.eclipse.unittest.ui/src/org/eclipse/unittest/internal/ui/CompareResultDialog.java b/org.eclipse.unittest.ui/src/org/eclipse/unittest/internal/ui/CompareResultDialog.java
index 7da6c65..67924ba 100644
--- a/org.eclipse.unittest.ui/src/org/eclipse/unittest/internal/ui/CompareResultDialog.java
+++ b/org.eclipse.unittest.ui/src/org/eclipse/unittest/internal/ui/CompareResultDialog.java
@@ -17,6 +17,8 @@
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 
+import org.osgi.framework.FrameworkUtil;
+
 import org.eclipse.unittest.internal.UnitTestPlugin;
 import org.eclipse.unittest.internal.model.TestElement;
 import org.eclipse.unittest.model.ITestElement;
@@ -218,10 +220,11 @@
 	 * Returns the section with the given name in this dialog settings.
 	 *
 	 * @param name the key
-	 * @return {@link IDialogSettings} (the section), or <code>null</code> if none
+	 * @return {@link IDialogSettings} (the section)
 	 */
 	private IDialogSettings getDialogSettingsSection(String name) {
-		IDialogSettings dialogSettings = UnitTestPlugin.getDefault().getDialogSettings();
+		IDialogSettings dialogSettings = PlatformUI.getDialogSettingsProvider(FrameworkUtil.getBundle(getClass()))
+				.getDialogSettings();
 		IDialogSettings section = dialogSettings.getSection(name);
 		if (section == null) {
 			section = dialogSettings.addNewSection(name);