Delete some already ported methods

Fixes #8951

Fixes #8823

This cannot be used in combination with HANDLES_COMMAND_LINE

Fixes #8947

Fixes #8941

Fixes #8924

Its not clear at this point why we dont find a contact is None, so log
output is added

SW authored 7 years ago and Philipp Hörist committed 7 years ago

Don't try to resolve _xmppconnect records for servers before trying to connect.
Prevent warnings from gajim.c.resolver for accounts with "connect on startup" disabled.

This adds a method that returns only a contact if there is an exact match,
instead of a contact where only the barejid matches.

We need this when we update the Caps of a contact.

Its later than StanzaMessageOutgoingEvent, this allows encryption
Plugins to not return the encrypted payload immediatly.
For example encrypting may take some time because a password is needed
or the load has to be encrypted in another Thread.

This shows corrected messages correctly in groupchat when we
receive the messages via MAM

1. Check if the message has the muc#user namespace
2. Check if we have this jid already in the DB
3. Last resort disco the jid

The server sends us carbons if one of our other resources has
a conversation in a muc we are not joined.
Instead we log the messages silently.

Fallback must be happening in init_emoticon() instead of PreferencesWindow

- Use ComboBoxText, its much simpler
- Add a dedicated method that returns all available themes
- If the configured Theme is not available fallback to font-emoticons

This gives the server the chance to react accordingly without applying
much logic.
Also it makes it easier for us to recognize MUC PMs in MAM querys