v1.9.0

81 configuration reseting when restarting webstorm (#82)

* Fix AppSettingsState persisting

AppSettingsState didn't persist between restart of IntelliJ.
Fixed by copying the approach of https://github.com/AMPivovarov/FastMouseScroll/blob/master/src/main/kotlin/FMSSettings.kt
with Service and State split a part, and making it as class, and more Java-ish.

* Bump version

Doing a minor since the state setup is quite different.