Add attached boolean to prevent exception

[oparamo]

Fatal Exception: java.lang.RuntimeException: Unable to destroy activity {li.vin.my/li.vin.my.app.AppMainActivity}: java.lang.RuntimeException: no bus!
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:5066)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:5089)
at android.app.ActivityThread.access$1700(ActivityThread.java:222)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1854)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by java.lang.RuntimeException: no bus!
at li.vin.my.app.presenter.AppDrawerPresenter.onDetachedFromWindow(AppDrawerPresenter.java:142)
at li.vin.my.app.presenter.AppDrawerPresenter.onDetachedFromWindow(AppDrawerPresenter.java:84)
at li.vin.appcore.screenview.ScreenViewImpl.onDetachedFromWindowImpl(ScreenViewImpl.java:83)
at li.vin.appcore.screenview.LinearLayoutScreenView.onDetachedFromWindow(LinearLayoutScreenView.java:91)
at android.view.View.dispatchDetachedFromWindow(View.java:15846)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3380)
at android.view.ViewGroup.removeViewInternal(ViewGroup.java:4950)
at android.view.ViewGroup.removeViewInternal(ViewGroup.java:4923)
at android.view.ViewGroup.removeView(ViewGroup.java:4854)
at li.vin.appcore.mortarflow.android.MortarFlowAppCompatActivity.onDestroy(MortarFlowAppCompatActivity.java:579)
at li.vin.my.app.AppMainActivity.onDestroy(AppMainActivity.java:1081)
at android.app.Activity.performDestroy(Activity.java:7102)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1170)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:5044)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:5089)
at android.app.ActivityThread.access$1700(ActivityThread.java:222)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1854)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)