add/remove coins from readme & matic -> pol on add wallet page (#2165)

* readme: remove xhv & add missing coins

* cw_core: wallet_type rename matic -> pol

README.md

@@ -26,10 +26,13 @@ Cake Wallet includes support for several cryptocurrencies, including:
 * Ethereum (ETH)
 * Litecoin (LTC)
 * Bitcoin Cash (BCH)
-* Polygon (Pol)
+* Polygon (POL)
 * Solana (SOL)
+* Tron (TRX)
 * Nano (XNO)
-* Haven (XHV)
+* Zano (ZANO)
+* Decred (DCR)
+* Wownero (WOW)
 
 ## Features
 
@@ -81,10 +84,6 @@ Cake Wallet includes support for several cryptocurrencies, including:
 * Automatically generate new addresses
 * Specify multiple recipients for batch sending
 
-### Haven Specific Features
-
-* Send, receive, and store XHV and all xAssets like xUSD, xEUR, xAG, etc.
-
 # Monero.com by Cake Wallet for Android and iOS
 
 ## Open Source Monero-Only Wallet

cw_core/lib/wallet_type.dart

@@ -193,7 +193,7 @@ String walletTypeToDisplayName(WalletType type) {
     case WalletType.banano:
       return 'Banano (BAN)';
     case WalletType.polygon:
-      return 'Polygon (MATIC)';
+      return 'Polygon (POL)';
     case WalletType.solana:
       return 'Solana (SOL)';
     case WalletType.tron: