Added support for wayland with gnome-shell.

src/dorkbox/systemTray/SystemTray.java

@@ -246,7 +246,9 @@ class SystemTray {
                     }
 
                     if ("gnome".equalsIgnoreCase(GDM)) {
+                        // install the Gnome extension
                         Tray.usingGnome = true;
+                        Extension.install();
 
                         // are we fedora? If so, what version?
                         // now, what VERSION of fedora? 23/24/25/? don't have AppIndicator installed, so we have to use GtkStatusIcon
@@ -274,7 +276,10 @@ class SystemTray {
                         return selectTypeQuietly(TrayType.GtkStatusIcon);
                     }
                     else if ("default".equalsIgnoreCase(GDM)) {
+                        // install the Gnome extension
                         Tray.usingGnome = true;
+                        Extension.install();
+
                         // this can be gnome3 on debian/kali
 
                         if (OSUtil.Linux.isKali()) {
@@ -300,11 +305,13 @@ class SystemTray {
                         return selectTypeQuietly(TrayType.GtkStatusIcon);
                     }
                     else if ("ubuntu".equalsIgnoreCase(GDM)) {
-                        // ubuntu 17.10 uses the NEW gnome DE, which screws up previous Ubuntu workarounds, since it's now proper Gnome
+                        // ubuntu 17.10+ uses the NEW gnome DE, which screws up previous Ubuntu workarounds, since it's now proper Gnome
                         int[] version = OSUtil.Linux.getUbuntuVersion();
                         if (version[0] > 17 || (version[0] == 17 && version[1] == 10)) {
                             // this is gnome 3.26.1
-                            logger.debug("This Ubuntu 17.10 is not yet supported!");
+                            // install the Gnome extension
+                            Tray.usingGnome = true;
+                            Extension.install();
                         }
 
                         return selectTypeQuietly(TrayType.AppIndicator);
@@ -328,7 +335,7 @@ class SystemTray {
                     return selectTypeQuietly(TrayType.AppIndicator);
                 }
                 case Unity7: {
-                    // Ubuntu Unity7 (17.04+, which has MIR) is a weird combination. It's "Gnome", but it's not "Gnome Shell".
+                    // Ubuntu Unity7 (17.04, which has MIR) is a weird combination. It's "Gnome", but it's not "Gnome Shell".
                     return selectTypeQuietly(TrayType.AppIndicator);
                 }
                 case XFCE: {

src/dorkbox/systemTray/gnomeShell/Extension.java

@@ -169,9 +169,22 @@ class Extension {
 
     private static
     void restartShell() {
+        if (OSUtil.DesktopEnv.isWayland()) {
+            // you can no longer restart the shell in wayland. You must logout-login for shell modifications to apply
+            // https://mail.gnome.org/archives/commits-list/2015-March/msg01019.html
+
+            // HOWEVER, with wayland, shell-extensions that DO NO MODIFY THE GUI (we don't, we just add icons to it)
+            // are enabled without a shell restart.
+
+            // if there are still difficulties, you can use the following
+            // gnome-shell-extension-tool -e SystemTray@Dorkbox
+            return;
+        }
+
+
         if (ENABLE_SHELL_RESTART) {
             if (SystemTray.DEBUG) {
-                logger.debug("DEBUG mode enabled. You need to log-in/out or manually restart the shell via '{}' to apply the changes.",
+                logger.debug("DEBUG mode enabled. You need to log-out/in or manually restart the shell via '{}' to apply the changes.",
                              SHELL_RESTART_COMMAND);
                 return;
             }

src/dorkbox/systemTray/ui/gtk/_GtkStatusIconNativeTray.java

@@ -222,11 +222,6 @@ class _GtkStatusIconNativeTray extends Tray {
         });
 
         bind(gtkMenu, null, systemTray);
-
-        // install the Gnome extension
-        if (Tray.usingGnome) {
-            Extension.install();
-        }
     }
 
     @Override