Revert "Ctrl-shift-U does not work work when editor is focused arduino#9895"

This reverts commit 15fc84e.

Author: yzykov

app/src/processing/app/Editor.java

@@ -169,9 +169,6 @@ public boolean test(SketchController controller) {
   /** Command-Option on Mac OS X, Ctrl-Alt on Windows and Linux */
   static final int SHORTCUT_ALT_KEY_MASK = ActionEvent.ALT_MASK |
     Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
-  /** Command-Option on Mac OS X, Ctrl-Shift on Windows and Linux */
-  static final int SHORTCUT_SHIFT_KEY_MASK = ActionEvent.SHIFT_MASK |
-    Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
 
   /**
    * true if this file has not yet been given a name by the user
@@ -673,22 +670,9 @@ private void buildSketchMenu(JMenu sketchMenu) {
     item.addActionListener(event -> handleExport(false));
     sketchMenu.add(item);
 
-    // Since CTRL+SHIFT+U is not working on iBus keyboard input method
-    // Lets redirect the shorcut for Linux to CTRL+ALT+U
-    // Leaving the preexisting behaviour for Windows & Mac OS
-    String OS = System.getProperty("os.name").toLowerCase();
-    if (OS.indexOf("nix") >= 0 || OS.indexOf("nux") >= 0 || OS.indexOf("aix") > 0)
-    {
-      item = newJMenuItemAlt(tr("Upload Using Programmer"), 'U');
-      item.addActionListener(event -> handleExport(true));
-      sketchMenu.add(item);
-    }
-    else
-    {
-      item = newJMenuItemShift(tr("Upload Using Programmer"), 'U');
-      item.addActionListener(event -> handleExport(true));
-      sketchMenu.add(item);
-    }
+    item = newJMenuItemShift(tr("Upload Using Programmer"), 'U');
+    item.addActionListener(event -> handleExport(true));
+    sketchMenu.add(item);
 
     item = newJMenuItemAlt(tr("Export compiled Binary"), 'S');
     item.addActionListener(event -> {
@@ -1366,7 +1350,7 @@ static public JMenuItem newJMenuItem(String title, int what) {
   // Control + Shift + K seems to not be working on linux (Xubuntu 17.04, 2017-08-19)
   static public JMenuItem newJMenuItemShift(String title, int what) {
     JMenuItem menuItem = new JMenuItem(title);
-    menuItem.setAccelerator(KeyStroke.getKeyStroke(what, SHORTCUT_SHIFT_KEY_MASK));
+    menuItem.setAccelerator(KeyStroke.getKeyStroke(what, SHORTCUT_KEY_MASK | ActionEvent.SHIFT_MASK));
     return menuItem;
   }