Correctly handle nick changes

.../kuschku/quasseldroid_ng/ui/viewmodel/QuasselViewModel.kt

...asseldroid_ng/util/compatibility/AndroidLoggingHandler.kt

...quassel/protocol/primitive/serializer/StringSerializer.kt

...ava/de/kuschku/libquassel/quassel/syncables/IrcChannel.kt

...n/java/de/kuschku/libquassel/quassel/syncables/IrcUser.kt

...n/java/de/kuschku/libquassel/quassel/syncables/Network.kt

...de/kuschku/libquassel/quassel/syncables/SyncableObject.kt

...schku/libquassel/quassel/syncables/interfaces/INetwork.kt

...ibquassel/quassel/syncables/interfaces/ISyncableObject.kt

.../main/java/de/kuschku/libquassel/session/ObjectStorage.kt

...ain/java/de/kuschku/libquassel/session/ProtocolHandler.kt