eclipse plugin: fix the wizards by signaling the monitor as done

utils/java/eclipse_plugin/src/wesnoth_eclipse_plugin/wizards/era/EraNewWizard.java

@@ -133,6 +133,8 @@ public class EraNewWizard extends NewWizardTemplate
 			}
 		});
 		monitor.worked(5);
+
+		monitor.done();
 	}
 
 	private InputStream getEraStream()

utils/java/eclipse_plugin/src/wesnoth_eclipse_plugin/wizards/faction/FactionNewWizard.java

@@ -144,6 +144,8 @@ public class FactionNewWizard extends NewWizardTemplate
 			}
 		});
 		monitor.worked(5);
+
+		monitor.done();
 	}
 
 	private InputStream getFactionStream()

utils/java/eclipse_plugin/src/wesnoth_eclipse_plugin/wizards/generator/WizardLauncher.java

@@ -125,6 +125,8 @@ public class WizardLauncher extends NewWizardTemplate
 					}
 			});
 			monitor.worked(5);
+
+			monitor.done();
 		} catch (Exception e)
 		{
 			Logger.getInstance().logException(e);

utils/java/eclipse_plugin/src/wesnoth_eclipse_plugin/wizards/scenario/ScenarioNewWizard.java

@@ -185,6 +185,8 @@ public class ScenarioNewWizard extends NewWizardTemplate
 			}
 		});
 		monitor.worked(1);
+
+		monitor.done();
 	}
 
 	/**