Issue with sorting RAM Watch and "Prev value as change" option about bizhawk HOT 2 CLOSED

The issue with this is obvious: the watch item has an attribute "prev" which is 
always the previous frames value, regardless of the option. All "Prev value as 
change" does is calculate the change accordingly and display the result in each 
column, meaning that it is never stored as a data item for the watch and thus 
cannot be sorted in the same way. Although I could create some workaround for 
this, I don't feel like that changes should be in the previous column; -2 will 
never match a previous value for an unsigned watch. Therefore, I propose that a 
new column be added called "Change" which has its own data item and its own 
column in both Ram Watch and Ram Search (You'd be able to decide whether or not 
to display it, of course). I will implement this upon approval.

Fixed as of r2467 due to "Prev value as change" being replaced by a Diff column 
which sorts properly.