Increase action timeout

Hi,

My users complain that when writing longer emails etc. they get an error when saving saying the page has expired. I believe it's because Elgg has set a limit at one hour to fill a form.

Is there any way to increase this value to 2 or 3 hours in the function "validate_action_token"?

Could I simply change this line:

$hour = 60*60;

to

$hour = 60*120;

Or would that break something else?

Regards

slyhne