Use un-translated labels to sort boards submenus

Otherwise it may happen some weird sorting when untraslated and
translated labels are sorted together:

    Arduino megaAVR Boards
    Arduino nRF52 Board
    ESP32 Arduino
    ESP8266 Modules
    Schede Arduino AVR   <-- the localized string falls to the bottom

all the Arduino boards should be packed together, so it's better to not
use localization at all while sorting. After this patch it will look like

    Schede Arduino AVR
    Arduino megaAVR Boards
    Arduino nRF52 Board
    ESP32 Arduino
    ESP8266 Modules

app/src/processing/app/Base.java

@@ -1481,19 +1481,29 @@ public void actionPerformed(ActionEvent actionevent) {
     ButtonGroup boardsButtonGroup = new ButtonGroup();
     Map<String, ButtonGroup> buttonGroupsMap = new HashMap<>();
 
-    List<JMenu> platformMenus = new ArrayList<JMenu>();
+    class PlatformJMenu extends JMenu {
+      private String untraslatedText;
+
+      public PlatformJMenu(TargetPlatform pl) {
+        super();
+        untraslatedText = pl.getPreferences().get("name");
+        if (untraslatedText == null) {
+          untraslatedText = pl.getContainerPackage().getId() + "-" + pl.getId();
+        }
+        setText(tr(untraslatedText));
+      }
+
+      public String getUntraslatedText() {
+        return untraslatedText;
+      }
+    }
+    List<PlatformJMenu> platformMenus = new ArrayList<>();
 
     // Cycle through all packages
     for (TargetPackage targetPackage : BaseNoGui.packages.values()) {
       // For every package cycle through all platform
       for (TargetPlatform targetPlatform : targetPackage.platforms()) {
-
-        // Add a title for each platform
-        String platformLabel = targetPlatform.getPreferences().get("name");
-        if (platformLabel == null)
-          platformLabel = targetPackage.getId() + "-" + targetPlatform.getId();
-
-        JMenu platformBoardsMenu = new JMenu(tr(platformLabel));
+        PlatformJMenu platformBoardsMenu = new PlatformJMenu(targetPlatform);
         MenuScroller.setScrollerFor(platformBoardsMenu);
         platformMenus.add(platformBoardsMenu);
 
@@ -1510,7 +1520,7 @@ public void actionPerformed(ActionEvent actionevent) {
       }
     }
 
-    platformMenus.sort((x,y) -> x.getText().compareToIgnoreCase(y.getText()));
+    platformMenus.sort((x,y) -> x.getUntraslatedText().compareToIgnoreCase(y.getUntraslatedText()));
 
     JMenuItem firstBoardItem = null;
     if (platformMenus.size() == 1) {