[Users] Customizing/Improving threaded view for '3 columns' layout

[Francis Moreau]

Hello,

I'm using the 'Three columns' layout.

I'd like to modify how the subject field is rendering because I don't
like how it's rendered currently by using 2 lines. Now I have for example:

 <subject>
 <from1> <date1>
    <Re: subject>
    <from2> <date2>

Is it possible to use only one line instead, like:

 <subject> <from1> <date1>
    <Re: subject> <from2> <date2>

or even better, use 2 lines for the original post and use only one line
for replies and remove the subject (unless it has changed) since there's
no point to repeat and waste one line repeating it:

 <subject>
 <from1> <date1>
    Replies <from2> <date2>
    ...

Thanks.