making Escape Column names function more flexible for different use cases

[prondubuisi]

Currently there is a function to escape column names https://github.com/LibreHealthIO/lh-ehr/blob/master/library/formdata.inc.php#L82 but this method is not used extensively because it doesn't cover use cases where the column name is

1. *

2. $col1, $col2, $col3 Making the above function flexible will ensure select $cols statements within the code base are properly escaped. I would like to work on this if any other person sees the need to.

[aethelwulffe]

I think this could be a better function indeed. More importantly, more extensive use would be good, and provide proof-of-concept examples.