Re-enable multi-line string editing for non-enum string options.

Fixes #66.

PiperOrigin-RevId: 222420597
diff --git a/src/Tulsi/OptionsEditorController.swift b/src/Tulsi/OptionsEditorController.swift
index 6010c96..30d4afc 100644
--- a/src/Tulsi/OptionsEditorController.swift
+++ b/src/Tulsi/OptionsEditorController.swift
@@ -249,7 +249,10 @@
         case .bool:
           newNode = OptionsEditorBooleanNode(key: key, option: option, model: model, target: target)
         case .string:
-          fallthrough
+          newNode = OptionsEditorStringNode(key: key,
+                                            option: option,
+                                            model: model,
+                                            target: target)
         case .stringEnum:
           newNode = OptionsEditorConstrainedStringNode(key: key,
                                                        option: option,