Accidental skipping when closing the app or using the notification widget

[NotSafarad]

###Is your feature request related to a problem? Please describe.

When trying to close the mobile app I sometimes accidentally press on the timeline. This can also occure when trying to interact with the notification widget. In both cases I am somtimes unable to find my previous spot in the book, which can be really annoying.

###Describe the solution you'd like

A button to undo the last skip action.

###Describe alternatives you've considered

A Setting to lock the timeline in the widget and the app. Booth features would be the best longterm, but one of those will suffice for time beeing. I have an example of in app locking attatched.