[applet] Adapt to changes in System tray appearance

- Make custom configure button only appear when not in the system tray
- Change icon of configure button to follow the standard

applet/contents/ui/Toolbar.qml

@@ -203,7 +203,7 @@ ColumnLayout {
         PlasmaComponents3.ToolButton {
             id: openEditorButton
 
-            visible: mainWindow.kcmAuthorized
+            visible: mainWindow.kcmAuthorized && plasmoid.containmentType !== PlasmaCore.Types.CustomEmbeddedContainment
 
             icon.name: "configure"
 

applet/contents/ui/main.qml

@@ -54,7 +54,7 @@ Item {
 
     Component.onCompleted: {
         if (kcmAuthorized) {
-            plasmoid.setAction("openKCM", i18n("&Configure Network Connections..."), "preferences-system-network");
+            plasmoid.setAction("openKCM", i18n("&Configure Network Connections..."), "configure");
         }
         plasmoid.removeAction("configure");
         plasmoid.setAction("showPortal", i18n("Open Network Login Page..."), "internet-services");