Added multilevel support in roomlist

[fank]

Relates #201

Example discord:

Before:

After:

[fank]

Joining in discord current do not work, but that's an other issue i'm working on.

[fank]

@vitalyster this is also ready to merge

[fank]

rebased and green

[vitalyster]

This patch also contains "clean up" fixes and it makes me hard to understand it

[fank]

split?

[vitalyster]

if these fixes still not in clean up patch - please add it into that one

[fank]

@vitalyster i cant, because my editor will clean open files, and can't do that for the whole project.
But you can use the whitespace hide functionality https://github.com/blog/967-github-secrets

Add ?w=1 to the URL to see the diff with whitespace ignored.

[fank]

i validated the cleanup changes is in #216

[fank]

@vitalyster branch is now clean

[vitalyster]

Can you join these rooms now?

[fank]

I havn't continued on the discord part jet, still not working.

[vitalyster]

So nothing to merge yet :)

[fank]

i <3 automated scripts, entered wrong repo ... this should not be closed.

[vitalyster]

again???

[fank]

Na i rechecked my PR's and noticed this is still open, but i ended all my xmpp related projects some month ago. so ill not continue this anymore.

[thundergreen]

@fank NO GOOD NEWS!

[fank]

Yea i know, but i'm still into developing stuff for discord so if someone would like to pick it up, than i could help. But i won't focus that.

[thundergreen]

@fank did u ever hear about issue where either discord or spectrum send messages to muc when member leaves the channel? We tried to find the source of this message but could't find it. This makes channel use in xmpp impossible as muc will be flooded with leave messages

[vitalyster]

I hope references are stored in main repository, I will restore as new PRs for someone who will want to continue