[GNC] Coloring the Action field

[AC]

I don't think I see this anywhere within the accessible settings but is 
it possible for the background of the Action field in a register to 
change color based on its contents?

I don't use the Action field much but I've found one particular use: to 
flag entries for transactions that I've entered placeholders/estimates 
but that I need to go back later and update with new values.

For example, I have a couple loans that are paid fixed amounts each 
month but the split of principal and interest varies (of course). I have 
automatic payments at the bank set up to pay those fixed amounts 
regularly and I have a matching scheduled transaction in GnuCash that is 
a placeholder for it so I know how much comes out of my checking 
account. What I don't know at that moment is the split between principal 
and interest.

For these placeholders I add the Action flag "Payment" since text in the 
Action column is a little more obvious as the column is sparsely 
populated compared to the Description/Notes and other fields.  When the 
payment has gone through I will check the loan records wherever the loan 
is held to see how they distributed the payment and then go back and 
update the splits to reflect that.

I do a similar thing for my paychecks, setting up a scheduled 
transaction with an estimated amount across splits and then go back to 
update the splits with the various amounts withheld from the check (I 
mark these as "Deposit").

Having a colored field would be fantastic since I could make that stand 
out quickly.  It would have to be per register/account since I know that 
the Action field has a bunch of different preloaded values depending on 
the account type and I also understand that it's a free text field.

I figured it's not hard to ask if something like that is sort of 
possible and I'm not hurt if it can't or won't be done. This is more 
just a "hey this would be useful to me, maybe someone thought the same 
and tried it" post.