Add dock & setting for it, edit StyledTooltip, move settings tabs around

Widgets/Sidebar/Panel/System.qml

@@ -422,6 +422,12 @@ Rectangle {
         running: false
     }
 
+    Process {
+        id: logoutProcess
+        command: ["loginctl", "terminate-user", Quickshell.env("USER")]
+        running: false
+    }
+
     function logout() {
         if (WorkspaceManager.isNiri) {
             logoutProcessNiri.running = true;