ULTIMA6: Nuvie.cfg values were not being loaded correctly

[yudhiwidyatama]

ScummVM version : ScummVM 2.8.1

Step to reproduce :

• download Ultima6 from GOG (or other sources), extract the files into some path (example : /data/ULTIMA6/)
• in the same folder/directory (/data/ULTIMA6/) put a newkeys.txt file (example attached)
• also in the same directory, put in nuvie.cfg which contains :

  <config>
  <keys>newkeys.txt</keys>
  </config>
  

• run ScummVM
• add the game in /data/ULTIMA6/ path as Ultima6-enh game
• start the game / load a savegame
• error occured :

  Console is ready
  Debugger started, type 'exit' to return to the game.
  Type 'help' to see a little list of commands and variables.
  ERROR: Couldn't find the default key setting at  - trying defaultkeys.txt in the data directory
  !
  

[yudhiwidyatama]

In 2cae1bec:

ULTIMA6: patch nuvie.cfg parsing by extracting text from child

Re-enables nuvie.cfg file parsing that were impacted by XMLNode
enhancement, picking the text value of first child if current
subtree text is empty. Fixes issue #15207.