Improved backwards compatibility of GetFeatures

Set all CoinType fields except signed_message_header.
Move static assert into the function where it is needed.

firmware/fsm.c

@@ -208,8 +208,6 @@ void fsm_msgInitialize(Initialize *msg)
 	fsm_msgGetFeatures(0);
 }
 
-_Static_assert(pb_arraysize(Features, coins) >= COINS_COUNT, "Features.coins max_count not large enough");
-
 void fsm_msgGetFeatures(GetFeatures *msg)
 {
 	(void)msg;
@@ -234,12 +232,32 @@ void fsm_msgGetFeatures(GetFeatures *msg)
 		resp->has_label = true;
 		strlcpy(resp->label, storage.label, sizeof(resp->label));
 	}
+	
+	_Static_assert(pb_arraysize(Features, coins) >= COINS_COUNT, "Features.coins max_count not large enough");
 	resp->coins_count = COINS_COUNT;
 	for (int i = 0; i < COINS_COUNT; i++) {
-		resp->coins[i].has_coin_name = true;
-		strlcpy(resp->coins[i].coin_name, coins[i].coin_name, sizeof(resp->coins[i].coin_name));
+		if (coins[i].coin_name) {
+			resp->coins[i].has_coin_name = true;
+			strlcpy(resp->coins[i].coin_name, coins[i].coin_name, sizeof(resp->coins[i].coin_name));
+		}
+		if (coins[i].coin_shortcut) {
+			resp->coins[i].has_coin_shortcut = true;
+			strlcpy(resp->coins[i].coin_shortcut, coins[i].coin_shortcut, sizeof(resp->coins[i].coin_shortcut));
+		}
+		resp->coins[i].has_address_type = coins[i].has_address_type;
+		resp->coins[i].address_type = coins[i].address_type;
 		resp->coins[i].has_maxfee_kb = true;
 		resp->coins[i].maxfee_kb = coins[i].maxfee_kb;
+		resp->coins[i].has_address_type_p2sh = coins[i].has_address_type_p2sh;
+		resp->coins[i].address_type_p2sh = coins[i].address_type_p2sh;
+		resp->coins[i].has_xpub_magic = coins[i].xpub_magic != 0;
+		resp->coins[i].xpub_magic = coins[i].xpub_magic;
+		resp->coins[i].has_xprv_magic = coins[i].xprv_magic != 0;
+		resp->coins[i].xprv_magic = coins[i].xprv_magic;
+		resp->coins[i].has_segwit = true;
+		resp->coins[i].segwit = coins[i].has_segwit;
+		resp->coins[i].has_forkid = coins[i].has_forkid;
+		resp->coins[i].forkid = coins[i].forkid;
 	}
 	resp->has_initialized = true; resp->initialized = storage_isInitialized();
 	resp->has_imported = true; resp->imported = storage.has_imported && storage.imported;