Updating legality with an invalid move name causes SelectedValue to
equal null. Use the util function that has null check for combobox &
selectedvalue.
bad settings files cause exceptions, silently delete them
move language init out of loadconfig (want it to happen regardless of
config errors, so load config value instead)
Grab an example PKM (from main window) to get the current value to
assist users in creating their modification scripts.
Added 3 tooltips for hovering over property/type/value controls
