Merge from origin/emacs-28

47e09d1855 Copy parent face attributes to tab-line-tab-current instea...
d96f8b22c0 Another fix for 'ibuffer-shrink-to-fit' (Bug#7218, Bug#51029)

lisp/ibuffer.el

@@ -1079,8 +1079,8 @@ a new window in the current frame, splitting vertically."
   ;; Make sure that redisplay is performed, otherwise there can be a
   ;; bad interaction with code in the window-scroll-functions hook
   (redisplay t)
-  (when (and (boundp 'ibuffer-auto-mode) ; ibuf-ext.el might not be loaded yet
-             (buffer-local-value 'ibuffer-auto-mode (window-buffer)))
+  (when (with-current-buffer (window-buffer)
+          (eq major-mode 'ibuffer-mode))
     (fit-window-to-buffer
      nil (and owin
               (/ (frame-height)

lisp/tab-line.el

@@ -119,7 +119,11 @@ function `tab-line-tab-face-group'."
   :group 'tab-line-faces)
 
 (defface tab-line-highlight
-  '((t :inherit tab-line-tab))
+  '((((class color) (min-colors 88))
+     :box (:line-width 1 :style released-button)
+     :background "grey85"
+     :foreground "black")
+    (t :inverse-video nil))
   "Tab line face for highlighting."
   :version "27.1"
   :group 'tab-line-faces)