[bisq-network/bisq] Refactor FilterWindow (#3364)

[Bernard Labno]

blabno requested changes on this pull request.



> @@ -301,4 +248,12 @@ private void addContent() {
         gridPane.getChildren().add(hBox);
         GridPane.setMargin(hBox, new Insets(10, 0, 0, 0));
     }
+
+    private List<String> readAsList(InputTextField field) {
+        if (field.getText().isEmpty()) {
+            return new ArrayList<>();

Use `Collections.emptyList()` instead of `new ArrayList<>()`.

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