Replaced all NWidgets callback by proper signals

Modules/Bar/Bar.qml

@@ -109,7 +109,7 @@ Variants {
           sizeMultiplier: 0.8
           showBorder: false
           anchors.verticalCenter: parent.verticalCenter
-          onClicked: function () {
+          onClicked: {
             demoPanel.isLoaded = !demoPanel.isLoaded
           }
         }
@@ -121,7 +121,7 @@ Variants {
           sizeMultiplier: 0.8
           showBorder: false
           anchors.verticalCenter: parent.verticalCenter
-          onClicked: function () {
+          onClicked: {
             // Map this button's center to the screen and open the side panel below it
             const localCenterX = width / 2
             const localCenterY = height / 2

Modules/Bar/Clock.qml

@@ -12,15 +12,15 @@ NClock {
     target: root
   }
 
-  onEntered: function () {
+  onEntered: {
     if (!calendar.isLoaded) {
       tooltip.show()
     }
   }
-  onExited: function () {
+  onExited: {
     tooltip.hide()
   }
-  onClicked: function () {
+  onClicked: {
     tooltip.hide()
     calendar.isLoaded = !calendar.isLoaded
   }

Modules/Bar/Volume.qml

@@ -70,7 +70,7 @@ Item {
         Audio.volumeDecrement()
       }
     }
-    onClicked: function () {
+    onClicked: {
       audioDeviceSelector.isLoaded = !audioDeviceSelector.isLoaded
     }
   }

Modules/Bar/WiFi.qml

@@ -24,7 +24,7 @@ NIconButton {
     return connected ? network.signalIcon(parent.currentSignal) : "wifi_off"
   }
   tooltipText: "WiFi Networks"
-  onClicked: function () {
+  onClicked: {
     if (!wifiMenuLoader.active) {
       wifiMenuLoader.isLoaded = true
     }

Modules/Bar/WiFiMenu.qml

@@ -78,7 +78,7 @@ NLoader {
             NIconButton {
               icon: "refresh"
               sizeMultiplier: 0.8
-              onClicked: function () {
+              onClicked: {
                 network.refreshNetworks()
               }
             }
@@ -86,7 +86,7 @@ NLoader {
             NIconButton {
               icon: "close"
               sizeMultiplier: 0.8
-              onClicked: function () {
+              onClicked: {
                 wifiPanel.visible = false
                 network.onMenuClosed()
               }