minor fixes

src/main/java/com/sparrowwallet/sparrow/SparrowWallet.java

@@ -86,7 +86,7 @@ public class SparrowWallet {
         SLF4JBridgeHandler.removeHandlersForRootLogger();
         SLF4JBridgeHandler.install();
 
-        if(args.terminal) {
+        if(args.terminal || java.awt.GraphicsEnvironment.isHeadless()) {
             PlatformImpl.setTaskbarApplication(false);
             com.sun.javafx.application.LauncherImpl.launchApplication(SparrowTerminal.class, SparrowWalletPreloader.class, argv);
         } else {

src/main/java/com/sparrowwallet/sparrow/terminal/wallet/LoadWallet.java

@@ -150,7 +150,9 @@ public class LoadWallet implements Runnable {
 
             Set<File> walletFiles = new LinkedHashSet<>();
             walletFiles.add(storage.getWalletFile());
-            walletFiles.addAll(Config.get().getRecentWalletFiles().stream().limit(MAX_RECENT_WALLETS - 1).collect(Collectors.toList()));
+            if(Config.get().getRecentWalletFiles() != null) {
+                walletFiles.addAll(Config.get().getRecentWalletFiles().stream().limit(MAX_RECENT_WALLETS - 1).collect(Collectors.toList()));
+            }
             Config.get().setRecentWalletFiles(Config.get().isLoadRecentWallets() ? new ArrayList<>(walletFiles) : Collections.emptyList());
         }