Fix sorting of motions in motion blocks when different standard sorting

Describe the bug
When the default sorting of motions is changed to call list in > settings > motions > numbering and sorting, the motions are sorted by title in motion blocks. This is not helpful in any case.

How to Reproduce

1. create a motion block with several motions (make sure motions in order of number are not also sorted alphabetically, in doubt use our test dataset)
2. change the default sorting of motions to call list
3. navigate to the motion block -> they are sorted alphabetically by title

Expected behavior
The motions are optimally ordered in the same order they are in the call list.

Additional context
If the expected behaviour is very hard to implement, alternatively the sorting within a motion block should be by numbers. Please contact me about uncertainties.

Start by reproducing the issue through Settings > Motions > numbering and sorting, then open a motion block with motions whose numbers and titles sort differently. Trace how the motion block determines its ordering and compare it with the configured call-list order. Done means motion blocks follow the selected call-list order, or consistently use motion numbers as the fallback.