fix text input action issue for desktop

com.unity.uiwidgets/Runtime/services/keyboard.cs

 
         TextEditingValue _value;
 
+        TextInputConfiguration _textInputConfiguration;
+
         public void show() {
         }
 
 
         public void setClient(int client, TextInputConfiguration configuration) {
             _client = client;
+            _textInputConfiguration = configuration;
+            _textInputConfiguration = null;
         }
 
         public bool imeRequired() {
                         }
 
                         if (ch == '\n') {
-                            Timer.create(TimeSpan.Zero, () => { TextInput._performAction(_client, TextInputAction.newline); });
+                            Timer.create(TimeSpan.Zero, () => { TextInput._performAction(_client, 
+                                _textInputConfiguration?.inputAction ?? TextInputAction.newline); });
                         }
 
                         if (_validateCharacter(ch)) {