Comment Report: Modals with form do not have error handling

[khamui]

URL:
user:
expected behaviour: Modals with form should show validation errors
behaviour: Modals with form do not have any validation errors
important screensize:
device & browser:
Comment/Question:
This error was mentioned here: #1338 (comment)

As the Report Modal inherits the base Modal, it misses validation errors as well. See related issue here:
#1149

[t-j-q]

Modals with forms (report) have a character limit but its not displayed and no error message when trying to send. Maybe make send button inactive when form is empty?

[CarolingerSeilchenspringer]

@TeaJayyy @mcastro-lqd Will close this issue as we have a design task for this and the design is currently in coordination with client.