otr: move connection outside of progress page

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
otr: split window repository into repository and factory

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
otr: cancel verification when wizard is canceled

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
otr: all wizard pages are now added in factory

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
otr: proper implementation of cancelation on wizard rejection

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