I'm not sure about how common it is, but we have for example an option to save messages into the folder the replied message comes from. And it is good to have visual information on to which folder the message will be saved while composing. There are also users that wanted occassionally to not save the message at all (as draft or after it's sent). That's why the select contains "- don't save -" option. So, there are some usecases.

Thanks, I fixed this in another place. See c32f0674ace8.

I think we'd need a change around https://git.kolab.org/diffusion/C/browse/master/lib/api/common.php$237, but I didn't think about it yet.

That scenario is not supported because you can't store config and you can't use cache without kolab backend. You could probably live without these in some setups, so yes in theory it should work. There must be a bug somewhere.

... and we should throw an error when fileapi_backend != 'kolab'.

I think we should finally remove that section from documentation. It is not supported scenario, I think it is not even supposed to work. There's a comment in sample config:

// Main files source, backend driver which handles
// authentication and configuration of Chwala
// Note: Currently only 'kolab' is supported
$config['fileapi_backend'] = 'kolab';

Yes, kolab_files uses now different (semi-recurrent) logic to fetch folders hierarchy. How exactly did you configure chwala with seafile?

That's a bug introduced by e544905221b and the fix makes sense.

@bohlender, would you make a summary in English for me, or should I just ignore all comments?

Check Roundcube error log. It might be caused by invalid/missing timezone setting in php.ini.

I installed Win10 (User-Agent: MSFT-WIN-3/10.0.17763) and it works for me. I see some problem when the folders limit is set, but this is not default. Check in config.inc.php if you have config['activesync_max_folders'] = 5;. If so, bump the number to 10.

It does not work for me. Maybe there's something to switch in fullCalendar settings or some bug. Need to investigate.

Fixed in rRPKa86269b6534a [roundcubemail-plugins-kolab master].

"is not equal to" implemented in e55bc13e33af3 [kolab-webadmin master].

I don't think this is a good idea.

Done in git-master.