fix scrolling on home screen for long lists of exercises

Problem description

A user wants to start a workout at a specific exercise (already implemented) and the workout consists of many (!) different exercises. The user expands one workout and scrolls down a little bit to search for the requested exercise. The drop-down list of exercises therefore fills up the whole screen on home_page. The parent element is no longer visible and the initial scrolling event ended. In this state, the user is unable to scroll any element of the screen.

Proposed solution

Add dummy-physics to the exercise ListView, such that scroll events are handled by parent element.

Screenshots