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This should users get accustomed to the UI changes we plan for 1.3

Also it hides the problems with the not scrollable tabs list because much more tabs fit the window

- Always show new avatars with status
- Remove tabs advanced config options
- Increase tabs width

Otherwise its not really portable if it stores data in the system keyring

libsoup checks system configured http proxys by itself

- This feature stems from the single device age
- Depends on deprecated Privacy Lists (XEP-0016)
- No support in other clients makes it in the current multiple device world useless
- Hard to maintain, prevents us to use even basic features like MUC because it would leak presence

- Change default timestamp to include date

closes #9272

Feature bloat. There is no good use case why the system defaults should not be sufficient.

- Move xhtml data into additional_data
- Remove xhtml event attribute
- Allows now to store both message and xhtml data in the database
- Always store xhtml data

This can be easily added back as a plugin if there is demand

I consider this feature bloat

In order to work on every system Gajim runs on (instead of only X11),
this new widget uses GTK+ Gstreamer elements.

It currently completely breaks the actual Jingle thing, but that was
already pretty broken so will be fixed in a later commit.

It might be nice to think about the way we want to make preferences
interact with a currently-running audio/video session, since it
currently uses a separate pipeline and thus will conflict when e.g. both
will want to access the same camera device, if the OS doesn’t implement
multiplexing (Linux doesn’t).

- Add own module for roster code
- Use avatars with status integrated
- Favor performance over features

The available options regarding closing tabs should be enough