added a resize option

* if the window is resized and ther is enough space for a new column, the UI will be adapt to fit the new size

bin/application/MainWindow.fxml

@@ -16,7 +16,7 @@
 <?import javafx.scene.text.Font?>
 <?import javafx.scene.text.TextFlow?>
 
-<AnchorPane prefHeight="600.0" prefWidth="892.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainWindowController">
+<AnchorPane fx:id="mainAnchorPane" prefHeight="600.0" prefWidth="892.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainWindowController">
    <children>
       <ScrollPane fx:id="scrollPaneMain" fitToWidth="true" layoutY="38.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="38.0">
          <content>
@@ -105,13 +105,13 @@
                </font>
             </Label>
          </children></AnchorPane>
-      <JFXButton fx:id="playBtn" buttonType="RAISED" maxHeight="38.0" maxWidth="100.0" onAction="#playBtnAction" ripplerFill="#c92a2a" text="play" visible="false" AnchorPane.bottomAnchor="7.0" AnchorPane.leftAnchor="396.0" AnchorPane.rightAnchor="396.0" AnchorPane.topAnchor="555.0">
+      <JFXButton fx:id="playBtn" buttonType="RAISED" layoutX="396.0" maxHeight="28.0" minWidth="100.0" onAction="#playBtnAction" ripplerFill="#00aacc" text="play" textAlignment="CENTER" visible="false" AnchorPane.bottomAnchor="12.0">
          <font>
             <Font name="System Bold" size="14.0" />
          </font>
       </JFXButton>
-      <JFXButton fx:id="totalPlaytimeBtn" buttonType="RAISED" maxHeight="32.0" minWidth="100.0" onAction="#totalPlaytimeBtnAction" prefHeight="32.0" style="-fx-background-color: #ffffff; -fx-button-type: RAISED; -fx-text-fill: BLACK;" visible="false" AnchorPane.bottomAnchor="10.0" AnchorPane.rightAnchor="516.5" AnchorPane.topAnchor="558.0">
+      <JFXButton fx:id="totalPlaytimeBtn" buttonType="RAISED" layoutX="275.5" maxHeight="32.0" minWidth="100.0" onAction="#totalPlaytimeBtnAction" prefHeight="32.0" style="-fx-background-color: #ffffff; -fx-button-type: RAISED; -fx-text-fill: BLACK;" text="0 h     0 min" visible="false" AnchorPane.bottomAnchor="10.0">
       </JFXButton>
-      <JFXButton fx:id="lastTimePlayedBtn" buttonType="RAISED" maxHeight="32.0" minWidth="100.0" onAction="#lastTimePlayedBtnAction" prefHeight="32.0" style="-fx-background-color: #ffffff; -fx-button-type: RAISED; -fx-text-fill: BLACK;" visible="false" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="516.5" AnchorPane.topAnchor="558.0" />
+      <JFXButton fx:id="lastTimePlayedBtn" buttonType="RAISED" layoutX="516.5" maxHeight="32.0" minWidth="100.0" onAction="#lastTimePlayedBtnAction" prefHeight="32.0" style="-fx-background-color: #ffffff; -fx-button-type: RAISED; -fx-text-fill: BLACK;" text="Last played, never" visible="false" AnchorPane.bottomAnchor="10.0" />
    </children>
 </AnchorPane>