Adjust GUI dimensions

GUI appears too large on laptop with smaller screen size as compared to
an external monitor. Reducing the height of the GUI will help.

src/main/resources/view/MainWindow.fxml

@@ -6,13 +6,13 @@
 <?import javafx.scene.layout.AnchorPane?>
 <?import javafx.scene.layout.VBox?>
 
-<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="750.0" prefWidth="500.0" xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml/1" fx:controller="tsundere.gui.MainWindow">
+<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="500.0" xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml/1" fx:controller="tsundere.gui.MainWindow">
     <children>
-        <TextField fx:id="userInput" layoutY="698.0" onAction="#handleUserInput" prefHeight="51.0" prefWidth="405.0" AnchorPane.bottomAnchor="1.0" />
-        <Button style="-fx-background-color: powderblue" fx:id="sendButton" layoutX="405.0" layoutY="698.0" mnemonicParsing="false" onAction="#handleUserInput" prefHeight="51.0" prefWidth="95.0" text="Send" />
-        <ScrollPane fx:id="scrollPane" hbarPolicy="NEVER" hvalue="1.0" prefHeight="697.0" prefWidth="500.0" vvalue="1.0">
+        <TextField fx:id="userInput" layoutY="558.0" onAction="#handleUserInput" prefHeight="51.0" prefWidth="405.0" AnchorPane.bottomAnchor="1.0" />
+        <Button style="-fx-background-color: powderblue" fx:id="sendButton" layoutX="405.0" layoutY="558.0" mnemonicParsing="false" onAction="#handleUserInput" prefHeight="51.0" prefWidth="95.0" text="Send" />
+        <ScrollPane fx:id="scrollPane" hbarPolicy="NEVER" hvalue="1.0" prefHeight="557.0" prefWidth="500.0" vvalue="1.0">
             <content>
-                <VBox style="-fx-background-color: powderblue" fx:id="dialogContainer" prefHeight="690.0" prefWidth="485.0" />
+                <VBox style="-fx-background-color: powderblue" fx:id="dialogContainer" prefHeight="552.0" prefWidth="485.0" />
             </content>
         </ScrollPane>
     </children>