Updates to help prevent some fatal exceptions.
Allow entering negative numbers using either "-" key and still be able to use "-" key to decrement current number.
VAVD - Integrate with S5 if Pressure2 from S5 is negative
ART - Integrate wiht S5 if Pressure2 from S5 is positive
Fix issue where Lab result updates were not updating the event log text
Fix sorting of drugs / fluids and add header for mixes in drop down list if there are mixes.
Set to only check for update once per minute and stop after 10 failures. Remove "Update" button from message if the update process failed.