title: Eclipse perspective won't stop changing
body: <p>Every time reopen my Eclipse, the menubar loses all of the Debug actions. I believed I have made my desired perspective the default one, but somehow the perspective itself loses the Debug Action Set. I can always edit the perspective to include the action set, but I want to make it so I'll always have the Debug action set included without manually adding it all the time. How can I do this?</p>
  
  <p>I don't if this is related but also when my program stops at a breakpoint, get this pop-up error <code>'Perspective Switch Job' has encountered a problem.</code> And the details say <code>java.lang.NullPointerException</code> even though I'm not using java in this project.</p>
  
  <p>I'm using Eclipse IDE for Java Developers, Mars Release 4.5.0, I am also using PyDev 4.2.0.</p>
  
  <pre><code>!ENTRY org.eclipse.ui 4 4 2015-12-16 13:51:34.602
  !MESSAGE Error
  !STACK 0
  java.lang.NullPointerException
      at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1270)
      at org.eclipse.ui.internal.WorkbenchPage$12.run(WorkbenchPage.java:4211)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:4207)
      at org.eclipse.debug.internal.ui.views.ViewContextService.showViewQuiet(ViewContextService.java:1175)
      at org.eclipse.debug.internal.ui.launchConfigurations.PerspectiveManager$4.runInUIThread(PerspectiveManager.java:528)
      at org.eclipse.debug.internal.ui.launchConfigurations.PerspectiveManager$MyUIJob$1.run(PerspectiveManager.java:229)
      at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
      at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
      at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4155)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3772)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
      at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
      at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
  </code></pre>