#174 - Add settings section for remote playwall instances

...l/src/main/java/de/tobias/playpad/view/PseudoClasses.java

.../main/java/de/tobias/playpad/settings/GlobalSettings.java

...ias/playpad/plugin/api/settings/WebApiRemoteSettings.java

...de/tobias/playpad/plugin/api/settings/WebApiSettings.java

.../src/main/resources/plugin/webapi/lang/base_de.properties

...src/main/resources/plugin/webapi/view/WebApiSettings.fxml

...ain/scala/de/tobias/playpad/plugin/api/WebApiPlugin.scala

...ad/plugin/api/settings/WebApiSettingsViewController.scala