Use im-kick-user consistently for logout.

I went with im-kick-user as it's fully red at all sizes.

BUG: 491355

src/login/WelcomePage.qml

@@ -122,7 +122,7 @@ Kirigami.Page {
 
                             QQC2.ToolButton {
                                 text: i18nc("@action:button", "Log out of this account")
-                                icon.name: "edit-delete-remove"
+                                icon.name: "im-kick-user"
                                 onClicked: Controller.removeConnection(modelData)
                                 display: QQC2.Button.IconOnly
                                 QQC2.ToolTip.text: text

src/qml/AccountMenu.qml

@@ -86,7 +86,7 @@ QQC2.Menu {
     }
     QQC2.MenuItem {
         text: i18n("Logout")
-        icon.name: "list-remove-user"
+        icon.name: "im-kick-user"
         onTriggered: confirmLogoutDialogComponent.createObject(QQC2.ApplicationWindow.window.overlay).open()
     }