Added toggle button for the chat history

#story[1274]

src/main/resources/views/RaceView.fxml

@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
+<?import com.jfoenix.controls.*?>
+<?import java.lang.*?>
+<?import java.net.*?>
+<?import javafx.geometry.*?>
+<?import javafx.scene.control.*?>
+<?import javafx.scene.image.*?>
+<?import javafx.scene.layout.*?>
+<?import javafx.scene.text.*?>
 <?import com.jfoenix.controls.JFXButton?>
 <?import com.jfoenix.controls.JFXSpinner?>
 <?import com.jfoenix.controls.JFXTextField?>
@@ -15,6 +23,7 @@
 <?import javafx.scene.layout.RowConstraints?>
 <?import javafx.scene.layout.StackPane?>
 <?import javafx.scene.text.Font?>
+
 <StackPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="800.0" prefWidth="1200.0" style="-fx-background-color: skyblue;" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="seng302.visualiser.controllers.RaceViewController">
         <children>
             <StackPane fx:id="contentStackPane" maxHeight="1.7976931348623157E308"
@@ -314,8 +323,7 @@
                     <Insets right="15.0" top="15.0" />
                 </StackPane.margin>
             </Pane>
-            <JFXButton fx:id="miniMapButton" text="—"
-              StackPane.alignment="TOP_RIGHT">
+            <JFXButton fx:id="miniMapButton" text="—" StackPane.alignment="TOP_RIGHT">
                 <font>
                     <Font size="15.0" />
                 </font>
@@ -330,6 +338,14 @@
                     <JFXSpinner layoutX="566.0" layoutY="692.0" radius="30.0"/>
                 </children>
             </AnchorPane>
+            <JFXButton fx:id="chatToggleButton" text="—" StackPane.alignment="BOTTOM_RIGHT">
+                <font>
+                    <Font size="15.0"/>
+                </font>
+                <StackPane.margin>
+                    <Insets bottom="70.0" right="10.0"/>
+                </StackPane.margin>
+            </JFXButton>
         </children>
     <stylesheets>
         <URL value="@../css/Master.css"/>