Fix missing loading bar for a motion

[Elblinator]

Current behaviour:
if you move via the arrows in between the motions then the loading bar does not appear but the words 'undefined'

Recreation:

1. create at least two motions (I recommend long motion > 1000 words)
2. go into motion 1
3. reload page
4. press the arrow in the top right region to navigate to the next motion
5. no loading bar but undefined

Wanted behaviour:
The loading bar should also appear if you use the arrows to move in between motions

[reiterl]

I cannot reproduce the problem on my developer setup. After clicking on the right-arrow the large motion instantly appears.

[jsangmeister]

Maybe try killing the autoupdate service while you are on a motion detail view and then try to navigate via the arrow buttons.

[Elblinator]

I tried it with more than 1000 motions (our biiiig dataset) and it still happens.

Apparently you need not only rather big motions but also a lot of them

[Elblinator]

I also tried it again with my own localhost
I have:

• 21 motions, 9 of them are amendments
• there are very long motions with +1000 words
• but also 10 which have at most 5 words

I can provoke the "undefined" if I skip through the motions (via arrow) very fast. But I can also see the "undefined" when I leisurely move from one motion to the other (also for motions with one word).

I am not doing anything else besides pressing the arrow.

[reiterl]

I can reproduce this problem. I have 10 motions. Reload, go into the detail view, press in the arrow-navigation on next/prev. See "undefined" for a moment.

[reiterl]

Mmh, the component which seems to have this failure is: os-motion-detail-original-change-recommendations.
TextLoaded doesn't seem to work right and doesn't show the mat-progress-bar. and there is a wrong html set to this
component in the beginning. (Sth like: "...undefined"). So the "undefined" is shown. I think the motion-diff part is setting the html. Strange.

[bastianjoel]

could be addressed in #4023