Fixed a problem with the close button in some popups can't be used to…

… close the popup

src/main/java/io/github/stekeblad/videouploader/utils/AlertUtils.java

@@ -4,6 +4,7 @@
 import javafx.application.Platform;
 import javafx.geometry.HPos;
 import javafx.geometry.Insets;
+import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Button;
@@ -58,7 +59,7 @@ private static GridPane makeLongMsgPane(String longMsg, boolean wrapText) {
         textArea.setEditable(false);
         textArea.setWrapText(wrapText);
         Button closeButton = new Button("Close");
-        closeButton.setCancelButton(true);
+        closeButton.setId("btnClose");
 
         GridPane pane = new GridPane();
         GridPane.setMargin(textArea, new Insets(3, 0, 0, 0));
@@ -78,6 +79,17 @@ private static GridPane makeLongMsgPane(String longMsg, boolean wrapText) {
     private static void paneToWindow(Pane pane, String header) {
         Scene alertDialog = new Scene(pane);
         Stage stage = new Stage();
+
+        // Try checking for a close button on the pane and bind it to closing the stage
+        Node closeButtonNode = alertDialog.lookup("#btnClose");
+        if (closeButtonNode instanceof Button) {
+            Button closeButton = (Button) closeButtonNode;
+            closeButton.setOnMouseClicked((event -> {
+                event.consume();
+                stage.close();
+            }));
+        }
+
         stage.initModality(Modality.APPLICATION_MODAL);
         stage.setScene(alertDialog);
         stage.setTitle(header);