add a close button

img-ui/src/main/kotlin/dev/nuculabs/imagetagger/ui/pages/AboutPage.kt

@@ -1,15 +1,18 @@
 package dev.nuculabs.imagetagger.ui.pages
 
+import javafx.application.Platform
 import javafx.fxml.FXML
 import javafx.fxml.FXMLLoader
 import javafx.scene.Parent
 import javafx.scene.Scene
+import javafx.scene.control.Button
 import javafx.stage.Stage
 import java.awt.Desktop
 import java.net.URL
 
 
 class AboutPage {
+    lateinit var closeButton: Button
 
     @FXML
     fun openBlog() {
@@ -21,6 +24,15 @@ class AboutPage {
         Desktop.getDesktop().browse(URL("https://github.com/dnutiu/ImageTagger").toURI());
     }
 
+    @FXML
+    fun closePage() {
+        Platform.runLater {
+            // Get a reference to the stage
+            val stage = closeButton.scene.window as Stage
+            stage.hide()
+        }
+    }
+
     companion object {
         fun show() {
             val fxmlLoader = FXMLLoader(AboutPage::class.java.getResource("about-page.fxml"))

img-ui/src/main/resources/dev/nuculabs/imagetagger/ui/pages/about-page.fxml

@@ -42,6 +42,12 @@
                 <FontIcon iconLiteral="fab-github" iconSize="16"/>
             </graphic>
         </Hyperlink>
-
+        <HBox alignment="CENTER_RIGHT" prefWidth="Infinity">
+            <Button fx:id="closeButton" text="Close" onAction="#closePage">
+                <graphic>
+                    <FontIcon iconLiteral="fas-window-close" iconSize="16"/>
+                </graphic>
+            </Button>
+        </HBox>
     </VBox>
 </AnchorPane>