Don't disable Chaturbate group in SettingsTab in server mode

It does not make sense to disable the Chaturbate group, since the
credentials are still needed to load the followed models and handle
tokens etc.

src/main/java/ctbrec/ui/SettingsTab.java

@@ -330,7 +330,6 @@ public class SettingsTab extends Tab implements TabSelectionListener {
         server.setDisable(local);
         port.setDisable(local);
         secureCommunication.setDisable(local);
-        ctb.setDisable(!local);
         recordingsDirectory.setDisable(!local);
         recordingsDirectoryButton.setDisable(!local);
         splitAfter.setDisable(!local);