Fix bugs for release (#564)

Signed-off-by: microwavedcola1 <microwavedcola@gmail.com>

programs/mango-v4/src/accounts_ix/group_withdraw_insurance_fund.rs

@@ -5,7 +5,6 @@ use anchor_spl::token::{self, Token, TokenAccount};
 #[derive(Accounts)]
 pub struct GroupWithdrawInsuranceFund<'info> {
     #[account(
-        mut,
         has_one = insurance_vault,
         has_one = admin,
         constraint = group.load()?.is_ix_enabled(IxGate::GroupWithdrawInsuranceFund) @ MangoError::IxIsDisabled,

programs/mango-v4/src/instructions/serum3_edit_market.rs

@@ -26,6 +26,9 @@ pub fn serum3_edit_market(
     };
 
     if let Some(force_close) = force_close_opt {
+        if force_close {
+            require!(serum3_market.reduce_only, MangoError::SomeError);
+        }
         msg!(
             "Force close: old - {:?}, new - {:?}",
             serum3_market.force_close,