Further improvements, bugfixes, and cleanup

...asseldroid/ui/coresettings/aliaslist/AliasListFragment.kt

...seldroid/ui/coresettings/chatlist/ChatListBaseFragment.kt

...id/ui/coresettings/highlightlist/HighlightListFragment.kt

...seldroid/ui/coresettings/identity/IdentityBaseFragment.kt

...seldroid/ui/coresettings/ignorelist/IgnoreListFragment.kt

...asseldroid/ui/coresettings/network/NetworkBaseFragment.kt

...kuschku/quasseldroid/util/ui/RipplePassthroughTextView.kt

app/src/main/res/layout/layout_history.xml

app/src/main/res/layout/widget_network.xml

app/src/main/res/values/strings_licenses.xml

...ku/libquassel/protocol/message/ClientInitAckSerializer.kt

...a/de/kuschku/libquassel/quassel/syncables/AliasManager.kt

.../kuschku/libquassel/quassel/syncables/BufferViewConfig.kt

...chku/libquassel/quassel/syncables/HighlightRuleManager.kt

.../java/de/kuschku/libquassel/quassel/syncables/Identity.kt

...kuschku/libquassel/quassel/syncables/IgnoreListManager.kt

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

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

lib/src/main/java/de/kuschku/libquassel/util/Optional.kt

...protocol/primitive/serializer/BufferInfoSerializerTest.kt