Fix long reasons extending the motion card on desktop view

[bspekker]

Describe the bug
If some content in a motion does not wrap and extends the boundaries of the motion card, this might cause other elements to extend the card as well (e.g. reason, change recs, summary of changes, motion text toolbar).
This was fixed for small screens with #5693 but is broken in desktop view.

How to Reproduce

1. create a motion with a reason that contains one string without spaces.
2. save the motion
3. create a change recommendation to the motion

--> the display of the change rec and reason will look similar to this:

Expected behavior
Make sure that content in the motion card will never extend the boundaries of the motion card.