Has been looked into before and the people who looked into it said it is a/in binary (can't be changed). Probably hard coded into LunaSysMgr (therefore, cannot be modified, since there is no source code available).
Suggest it as a feature to Palm and you might get it (doubtful)
Former webOS DevRel Engineer at Palm, HP, and LG
Former webOS app developer (built Voice Memos, Sparrow, and several homebrew apps and patches)
Former blogger for webOS Nation and webOS Roundup