Always keep scroll position, fix service connection leak

app/build.gradle.kts

...main/java/de/kuschku/quasseldroid/ui/chat/ChatActivity.kt

...kuschku/quasseldroid/ui/chat/buffers/BufferListAdapter.kt

...u/quasseldroid/ui/chat/buffers/BufferViewConfigAdapter.kt

.../quasseldroid/ui/chat/buffers/BufferViewConfigFragment.kt

...a/de/kuschku/quasseldroid/util/lists/AsyncDifferConfig.kt

...ava/de/kuschku/quasseldroid/util/lists/AsyncListDiffer.kt

...in/java/de/kuschku/quasseldroid/util/lists/ListAdapter.kt

...hku/quasseldroid/util/service/BackendServiceConnection.kt

lib/build.gradle.kts

lifecycle-ktx/build.gradle.kts

...n/java/android/arch/lifecycle/DefaultLifecycleObserver.kt

...va/android/arch/lifecycle/FullLifecycleObserverProxy.java

settings.gradle

...ava/de/kuschku/quasseldroid/viewmodel/QuasselViewModel.kt