a4-comments: unify textarea character counter for simpler screen reader handling

[hom3mad3]

The meinBerlin redesign simplified the textarea character counter to display as 0/4000. However, this differs from the library's current format 0/4000 Characters, leading to a convoluted and overly complex solution. In order to maintain clean code practices, we propose standardizing the character counter on all platforms to either display "0/400" or stick to "0/400 Characters". This makes sure we stay consistent and also simplifies the code by focusing on a singular solution everywhere.

the issue has been introduced in https://github.com/liqd/adhocracy4/commit/61855b37cc5bcc82eeb110ac39c718dd84e179d3

[hom3mad3]

@CarolingerSeilchenspringer @mcastro-lqd

me and @goapunk had a chat about the design inconsistency across platforms causing dependency issues. We're thinking it might be a good idea to unify the design everywhere to prevent the code from becoming too complex. However, given that this is relatively minor, i created this issue so we don't forget about it and eventually make a decision when we have less pressure with the redesign.

[CarolingerSeilchenspringer]

@hom3mad3 I think we can quickly decide on this: I prefer 0/4000 characters (in German 0/4000 Zeichen) as it makes more clear what it means. This is also what we currently have for the comments on both a+ and mB. @TeaJayyy @mcastro-lqd do you have a different opinion? @mcastro-lqd do we have restrictions here coming from Berlin styleguide?

[t-j-q]

@CarolingerSeilchenspringer @hom3mad3 @mcastro-lqd Yes, I'd prefer the option with "characters" as well!