Implements improved autocomplete

...ain/java/de/kuschku/quasseldroid/dagger/SettingsModule.kt

...va/de/kuschku/quasseldroid/settings/AppearanceSettings.kt

.../de/kuschku/quasseldroid/settings/AutoCompleteSettings.kt

...rc/main/java/de/kuschku/quasseldroid/settings/Settings.kt

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

...main/java/de/kuschku/quasseldroid/ui/chat/input/Editor.kt

...va/de/kuschku/quasseldroid/ui/chat/input/FormatHandler.kt

...kuschku/quasseldroid/util/service/ServiceBoundActivity.kt

app/src/main/res/values-de/strings_preferences.xml

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

app/src/main/res/xml/preferences.xml