Fix password menu stickiness before first auth (#21295)

Marlin/src/feature/password/password.cpp

@@ -31,7 +31,7 @@
 Password password;
 
 // public:
-bool     Password::is_set, Password::is_locked;
+bool     Password::is_set, Password::is_locked, Password::did_first_run; // = false
 uint32_t Password::value, Password::value_entry;
 
 //
@@ -47,11 +47,14 @@ void Password::lock_machine() {
 // Authentication check
 //
 void Password::authentication_check() {
-  if (value_entry == value)
+  if (value_entry == value) {
     is_locked = false;
-  else
+    did_first_run = true;
+  }
+  else {
+    is_locked = true;
     SERIAL_ECHOLNPGM(STR_WRONG_PASSWORD);
-
+  }
   TERN_(HAS_LCD_MENU, authentication_done());
 }
 

Marlin/src/feature/password/password.h

@@ -25,10 +25,10 @@
 
 class Password {
 public:
-  static bool is_set, is_locked;
+  static bool is_set, is_locked, did_first_run;
   static uint32_t value, value_entry;
 
-  Password() { is_locked = false; }
+  Password() {}
 
   static void lock_machine();
   static void authentication_check();

Marlin/src/lcd/menu/menu_password.cpp

@@ -44,12 +44,18 @@ static uint8_t digit_no;
 // Screen for both editing and setting the password
 //
 void Password::menu_password_entry() {
+  ui.defer_status_screen(!did_first_run); // No timeout to status before first auth
+
   START_MENU();
 
   // "Login" or "New Code"
   STATIC_ITEM_P(authenticating ? GET_TEXT(MSG_LOGIN_REQUIRED) : GET_TEXT(MSG_EDIT_PASSWORD), SS_CENTER|SS_INVERT);
 
-  STATIC_ITEM_P(NUL_STR, SS_CENTER|SS_INVERT, string);
+  STATIC_ITEM_P(NUL_STR, SS_CENTER, string);
+
+  #if HAS_MARLINUI_U8GLIB
+    STATIC_ITEM_P(NUL_STR, SS_CENTER, "");
+  #endif
 
   // Make the digit edit item look like a sub-menu
   PGM_P const label = GET_TEXT(MSG_ENTER_DIGIT);
@@ -57,7 +63,7 @@ void Password::menu_password_entry() {
   MENU_ITEM_ADDON_START(utf8_strlen_P(label) + 1);
     lcd_put_wchar(' ');
     lcd_put_wchar('1' + digit_no);
-    SETCURSOR_X(LCD_WIDTH - 1);
+    SETCURSOR_X(LCD_WIDTH - 2);
     lcd_put_wchar('>');
   MENU_ITEM_ADDON_END();
 
@@ -104,7 +110,7 @@ void Password::screen_password_entry() {
   value_entry = 0;
   digit_no = 0;
   editable.uint8 = 0;
-  memset(string, '-', PASSWORD_LENGTH);
+  memset(string, '_', PASSWORD_LENGTH);
   string[PASSWORD_LENGTH] = '\0';
   menu_password_entry();
 }
@@ -120,7 +126,6 @@ void Password::authenticate_user(const screenFunc_t in_succ_scr, const screenFun
   if (is_set) {
     authenticating = true;
     ui.goto_screen(screen_password_entry);
-    ui.defer_status_screen();
     ui.update();
   }
   else {