Rename NXG theme to flat

assets/Resources.qrc

@@ -132,7 +132,7 @@
         <file>qml/Windows/JsonEditor.qml</file>
         <file>qml/Windows/MainWindow.qml</file>
         <file>qml/main.qml</file>
-        <file>themes/2_Classic.json</file>
+        <file>themes/1_Classic.json</file>
         <file>touchbar/console.png</file>
         <file>touchbar/dashboard.png</file>
         <file>touchbar/setup.png</file>
@@ -162,8 +162,8 @@
         <file>window-border/restore.svg</file>
         <file>window-border/unmaximize.svg</file>
         <file>qml/Windows/MQTTConfiguration.qml</file>
-        <file>themes/1_NXG.json</file>
-        <file>themes/3_Noir.json</file>
+        <file>themes/3_Flat.json</file>
+        <file>themes/2_Noir.json</file>
         <file>themes/4_MathWorks.json</file>
     </qresource>
 </RCC>

assets/themes/3_Flat.json

@@ -1,5 +1,5 @@
 {
-   "name":"NXG",
+   "name":"Flat",
    "author":"Alex Spataru",
    "titlebarSeparator":false,
    "colors":{