gadu: remove not valid comment

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
protocols: added notification for roster synchronization

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
gui: small improvements in ChatWidgetManager

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
gui: move ChatWidget code to seprate directory

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
gui: split ChatWidgetFactory from ChatWidgetManager

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>