Feature/tweak stealth mode (#13963)

* Update the stealth mode description to reflect the current code changes in 2.4.

* disable HMS if bambu network plugin is not installed or in stealth mode

* fix build err

* add hide_login_side_panel to control whether to show login panel in home page

src/libslic3r/AppConfig.hpp

@@ -85,6 +85,7 @@ public:
 	std::string get_language_code();
 	std::string get_hms_host();
 	bool get_stealth_mode();
+	bool get_hide_login_side_panel();
 
 	// Clear and reset to defaults.
 	void 			   	reset();