Vocabulary element in Sumission form cannot be focused

[MarisArins]

Recently (probably after Angular v10 upgrade) vocabulary elements cannot be focused by clicking them.

As example check the "Subject Keywords" in demo site.

You can focus the input field only by clicking label of this field (blue area).
Clicking input field directly has no effect.

[tdonohue]

Can reproduce on https://demo7.dspace.org/, though this appears to be at least partially fixed by #1025

[tdonohue]

@atarix83 : I ran into this same issue while testing #1025 today. I think this is unrelated to that other issue, but I figured you might be able to estimate this quickly since you are working on other parts of the submission UI. So, I've assigned this to you for analysis & estimation. If possible, I'd like to fix this in Beta 5 (since it used to work), but let me know what you find.

[atarix83]

@tdonohue I think it could be fixed in 1 hour.