Allow typing in tracker score similar to chapters (closes #2498)

app/src/main/res/layout/track_score_dialog.xml

@@ -10,7 +10,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:descendantFocusability="blocksDescendants"
         app:max="10"
         app:min="0" />