Fix equip order (#6876)

* Fixes equip order
* Accessoires now prioritize the left side of the equipment window (if both slots are occupied)
* Weapons now prioritize the left side (right hand) in renewal
* Weapons still prioritize the right side (shield hand) in pre-renewal

src/map/pc.cpp

@@ -11386,7 +11386,7 @@ bool pc_equipitem(struct map_session_data *sd,short n,int req_pos,bool equipswit
 	if(pos == EQP_ACC) { //Accessories should only go in one of the two.
 		pos = req_pos&EQP_ACC;
 		if (pos == EQP_ACC) //User specified both slots.
-			pos = equip_index[EQI_ACC_R] >= 0 ? EQP_ACC_L : EQP_ACC_R;
+			pos = (equip_index[EQI_ACC_R] >= 0 && equip_index[EQI_ACC_L] < 0) ? EQP_ACC_L : EQP_ACC_R;
 
 		for (i = 0; i < sd->inventory_data[n]->slots; i++) { // Accessories that have cards that force equip location
 			if (!sd->inventory.u.items_inventory[n].card[i])
@@ -11406,11 +11406,15 @@ bool pc_equipitem(struct map_session_data *sd,short n,int req_pos,bool equipswit
 	} else if(pos == EQP_ARMS && id->equip == EQP_HAND_R) { //Dual wield capable weapon.
 		pos = (req_pos&EQP_ARMS);
 		if (pos == EQP_ARMS) //User specified both slots, pick one for them.
+#ifdef RENEWAL
+			pos = (equip_index[EQI_HAND_R] >= 0 && equip_index[EQI_HAND_L] < 0) ? EQP_HAND_L : EQP_HAND_R;
+#else
 			pos = equip_index[EQI_HAND_R] >= 0 ? EQP_HAND_L : EQP_HAND_R;
+#endif
 	} else if(pos == EQP_SHADOW_ACC) { // Shadow System
 		pos = req_pos&EQP_SHADOW_ACC;
 		if (pos == EQP_SHADOW_ACC)
-			pos = equip_index[EQI_SHADOW_ACC_L] >= 0 ? EQP_SHADOW_ACC_R : EQP_SHADOW_ACC_L;
+			pos = (equip_index[EQI_SHADOW_ACC_L] >= 0 && equip_index[EQI_SHADOW_ACC_R] < 0) ? EQP_SHADOW_ACC_R : EQP_SHADOW_ACC_L;
 	} else if(pos == EQP_SHADOW_ARMS && id->equip == EQP_SHADOW_WEAPON) {
 		pos = (req_pos&EQP_SHADOW_ARMS);
 		if( pos == EQP_SHADOW_ARMS )