IllegalStateException in Activity.performRestart(): Already closed cursor

v0.3.1 via dev con:

java.lang.RuntimeException: Unable to resume activity {net.lp.collectionista/net.lp.collectionista.ui.activities.items.book.BookItemEditWindow}: java.lang.IllegalStateException: trying to requery an already closed cursor
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2215)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2243)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1019)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:126)
at android.app.ActivityThread.main(ActivityThread.java:3997)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: trying to requery an already closed cursor
at android.app.Activity.performRestart(Activity.java:4337)
at android.app.Activity.performResume(Activity.java:4360)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2205)
... 10 more

Seems like mCursor.close() has already happened, but activity is paused and resumed before it could be finished.

Only place I can see this happen is in cancelProduct() (and quickDeleteProduct(), which means cancelProduct() then), which means checkDoNotKeepOnPauseBasedOnTextLength() and subsequently checkDoNotKeepOnPause().

Get ideas from #976174