SessionMenu: implement tab based navigation with wrapping next/previous functions

Modules/SessionMenu/SessionMenu.qml

@@ -204,6 +204,18 @@ NPanel {
       enabled: root.opened
     }
 
+    Shortcut {
+      sequence: "Tab"
+      onActivated: ui.selectNextWrapped()
+      enabled: root.opened
+    }
+
+    Shortcut {
+      sequence: "Shift+Tab"
+      onActivated: ui.selectPreviousWrapped()
+      enabled: root.opened
+    }
+
     Shortcut {
       sequence: "Home"
       onActivated: ui.selectFirst()
@@ -259,6 +271,14 @@ NPanel {
       root.selectLast()
     }
 
+    function selectNextWrapped() {
+      root.selectNextWrapped()
+    }
+
+    function selectPreviousWrapped() {
+      root.selectPreviousWrapped()
+    }
+
     function activate() {
       root.activate()
     }