IxGateSet: Log AccountBuybackFeesWithMngo state

programs/mango-v4/src/instructions/ix_gate_set.rs

@@ -64,6 +64,7 @@ pub fn ix_gate_set(ctx: Context<IxGateSet>, ix_gate: u128) -> Result<()> {
     log_if_changed(&group, ix_gate, IxGate::TokenRegisterTrustless);
     log_if_changed(&group, ix_gate, IxGate::TokenUpdateIndexAndRate);
     log_if_changed(&group, ix_gate, IxGate::TokenWithdraw);
+    log_if_changed(&group, ix_gate, IxGate::AccountBuybackFeesWithMngo);
 
     group.ix_gate = ix_gate;
 

programs/mango-v4/src/state/group.rs

@@ -187,6 +187,7 @@ pub enum IxGate {
     TokenUpdateIndexAndRate = 46,
     TokenWithdraw = 47,
     AccountBuybackFeesWithMngo = 48,
+    // NOTE: Adding new variants requires matching changes in ts and the ix_gate_set instruction.
 }
 
 // note: using creator instead of admin, since admin can be changed