problem

The usage of the repetition editor is to slow in the UI in fast review processes.

The problem is here the overall blocking of the screen when one repetition editor call is running and another one is triggered.

So currently there might be only one repetition editor call at a time (assumption).

We should change the code, so that it is able to deal with multiple repetition editor calls running.

Segment locking is done like currently:

What must be done in addition: When gird is scrolled and new entries are loaded in the store