explicitly commit spinner editor value when closing dialogs

src/main/java/com/sparrowwallet/sparrow/wallet/AdvancedController.java

@@ -83,6 +83,10 @@ public class AdvancedController implements Initializable {
         });
     }
 
+    public void close() {
+        gapLimit.commitValue();
+    }
+
     private ObservableList<Integer> getWatchListItems(Wallet wallet) {
         return FXCollections.observableList(DEFAULT_WATCH_LIST_ITEMS.stream().filter(val -> val < 0 || val > wallet.getGapLimit()).collect(Collectors.toList()));
     }

src/main/java/com/sparrowwallet/sparrow/wallet/AdvancedDialog.java

@@ -36,6 +36,10 @@ public class AdvancedDialog extends Dialog<Boolean> {
             dialogPane.setPrefHeight(300);
             AppServices.moveToActiveWindowScreen(this);
 
+            setOnCloseRequest(event -> {
+                settingsAdvancedController.close();
+            });
+
             setResultConverter(dialogButton -> dialogButton == passwordButtonType);
         }
         catch(IOException e) {

src/main/java/com/sparrowwallet/sparrow/wallet/MixToController.java

@@ -135,6 +135,10 @@ public class MixToController implements Initializable {
         });
     }
 
+    public void close() {
+        minMixes.commitValue();
+    }
+
     public MixConfig getMixConfig() {
         return mixConfig;
     }

src/main/java/com/sparrowwallet/sparrow/wallet/MixToDialog.java

@@ -51,6 +51,7 @@ public class MixToDialog extends Dialog<MixConfig> {
             setResultConverter(dialogButton -> dialogButton == applyButtonType ? mixToController.getMixConfig() : null);
 
             setOnCloseRequest(event -> {
+                mixToController.close();
                 EventManager.get().unregister(this);
             });
             EventManager.get().register(this);