Check if setup tab is visible

app/src/main/java/eu/faircode/email/FragmentOptions.java

@@ -112,6 +112,10 @@ public class FragmentOptions extends FragmentBase {
         getActivity().getIntent().removeExtra("tab");
     }
 
+    boolean isVisible(int position) {
+        return (pager.getCurrentItem() == position);
+    }
+
     private class PagerAdapter extends FragmentStatePagerAdapter {
         public PagerAdapter(FragmentManager fm) {
             super(fm);

app/src/main/java/eu/faircode/email/FragmentSetup.java

@@ -352,9 +352,12 @@ public class FragmentSetup extends FragmentBase {
 
             @Override
             public boolean onBackPressed() {
-                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED))
+                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED) &&
+                        ((FragmentOptions) getParentFragment()).isVisible(0)) {
                     onExit();
-                return true;
+                    return true;
+                } else
+                    return false;
             }
         });