DefaultWelcomeService: always display message on displayWelcome()

Only the event is allowed to check whether we already have shown the
message...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/main/java/org/scijava/welcome/DefaultWelcomeService.java

@@ -88,14 +88,18 @@ public class DefaultWelcomeService extends AbstractService implements
 
 	@Override
 	public void displayWelcome() {
+		displayWelcome(true);
+	}
+
+	private void displayWelcome(final boolean force) {
 		final File baseDir = appService.getApp().getBaseDirectory();
 		final File welcomeFile = new File(baseDir, WELCOME_FILE);
 		try {
 			if (welcomeFile.exists()) {
 				final String welcomeText = textService.asHTML(welcomeFile);
 				final String checksum = getChecksum(welcomeText);
 				final String previousChecksum = Prefs.get(getClass(), CHECKSUM_PREFS_KEY);
-				if (checksum.equals(previousChecksum)) return;
+				if (!force && checksum.equals(previousChecksum)) return;
 				Prefs.put(getClass(), CHECKSUM_PREFS_KEY, checksum);
 				displayService.createDisplay(welcomeText);
 			}
@@ -124,7 +128,7 @@ protected void onEvent(@SuppressWarnings("unused") final UIShownEvent evt) {
 		if (!isFirstRun()) return;
 		eventService.publish(new WelcomeEvent());
 		setFirstRun(false);
-		displayWelcome();
+		displayWelcome(false);
 	}
 
 	// -- Helper methods --