show no extension files in linux

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

@@ -445,7 +445,7 @@ public class AppController implements Initializable {
         FileChooser fileChooser = new FileChooser();
         fileChooser.setTitle("Open Transaction");
         fileChooser.getExtensionFilters().addAll(
-                new FileChooser.ExtensionFilter("All Files", "*.*"),
+                new FileChooser.ExtensionFilter("All Files", "*"),
                 new FileChooser.ExtensionFilter("PSBT", "*.psbt"),
                 new FileChooser.ExtensionFilter("TXN", "*.txn")
         );

src/main/java/com/sparrowwallet/sparrow/control/FileImportPane.java

@@ -84,7 +84,7 @@ public abstract class FileImportPane extends TitledDescriptionPane {
         FileChooser fileChooser = new FileChooser();
         fileChooser.setTitle("Open " + importer.getWalletModel().toDisplayString() + " File");
         fileChooser.getExtensionFilters().addAll(
-                new FileChooser.ExtensionFilter("All Files", "*.*"),
+                new FileChooser.ExtensionFilter("All Files", "*"),
                 new FileChooser.ExtensionFilter("JSON", "*.json"),
                 new FileChooser.ExtensionFilter("TXT", "*.txt")
         );

src/main/java/com/sparrowwallet/sparrow/preferences/ServerPreferencesController.java

@@ -109,7 +109,7 @@ public class ServerPreferencesController extends PreferencesDetailController {
             FileChooser fileChooser = new FileChooser();
             fileChooser.setTitle("Select Electrum Server certificate");
             fileChooser.getExtensionFilters().addAll(
-                    new FileChooser.ExtensionFilter("All Files", "*.*"),
+                    new FileChooser.ExtensionFilter("All Files", "*"),
                     new FileChooser.ExtensionFilter("CRT", "*.crt")
             );