Fix menu behaviour on Linux.

app/qml/TerminalWindow.qml

@@ -46,7 +46,7 @@ ApplicationWindow {
 
     Loader {
         id: qtquickMenuLoader
-        active: !appSettings.isMacOS && (appSettings.showMenubar && !fullscreen)
+        active: appSettings.isMacOS || (appSettings.showMenubar && !fullscreen)
         sourceComponent: WindowMenu { }
     }
 
@@ -56,23 +56,14 @@ ApplicationWindow {
 
     title: terminalTabs.currentTitle
 
-    Action {
-        id: showMenubarAction
-        text: qsTr("Show Menubar")
-        enabled: !appSettings.isMacOS
-        shortcut: "Ctrl+Shift+M"
-        checkable: true
-        checked: appSettings.showMenubar
-        onTriggered: appSettings.showMenubar = !appSettings.showMenubar
-    }
     Action {
         id: fullscreenAction
         text: qsTr("Fullscreen")
         enabled: !appSettings.isMacOS
         shortcut: "Alt+F11"
-        onTriggered: appSettings.fullscreen = !appSettings.fullscreen
+        onTriggered: fullscreen = !fullscreen
         checkable: true
-        checked: appSettings.fullscreen
+        checked: fullscreen
     }
     Action {
         id: newWindowAction

app/qml/main.qml

@@ -46,11 +46,6 @@ QtObject {
 
     property ListModel windowsModel: ListModel { }
 
-    property Loader globalMenuLoader: Loader {
-        active: appSettings.isMacOS
-        sourceComponent: OSXMenu { }
-    }
-
     function createWindow() {
         var window = windowComponent.createObject(null)
         if (!window)

app/qml/menus/FullContextMenu.qml

@@ -64,10 +64,6 @@ Menu {
             action: fullscreenAction
             visible: fullscreenAction.enabled
         }
-        MenuItem {
-            action: showMenubarAction
-            visible: showMenubarAction.enabled
-        }
         MenuItem {
             action: zoomIn
         }

app/qml/menus/WindowMenu.qml

@@ -56,10 +56,6 @@ MenuBar {
             action: fullscreenAction
             visible: fullscreenAction.enabled
         }
-        MenuItem {
-            action: showMenubarAction
-            visible: showMenubarAction.enabled
-        }
         MenuItem {
             action: zoomIn
         }