org: Fontify whole table rows with `org-table-row' face

* lisp/org-faces.el (org-table-row): New face.
* lisp/org.el (org-set-font-lock-defaults): Use ~org-table-row~ face
to fontify the whole table rows, including indentation and newlines.
* etc/ORG-NEWS (Org mode now fontifies whole table lines (including
newline) according to ~org-table~ face): Announce the change.

etc/ORG-NEWS

@@ -13,6 +13,23 @@ Please send Org bug reports to mailto:emacs-orgmode@gnu.org.
 
 * Version 9.7 (not released yet)
 ** Important announcements and breaking changes
+*** Org mode now fontifies whole table lines (including newline) according to ~org-table~ face
+
+Previously, leading indentation and trailing newline in table rows
+were not fontified using ~org-table~ face.  ~default~ face was used instead.
+This made it impossible to scale line height when ~org-table~ face has
+smaller height than default (Emacs calculates line height using the tallest face).
+
+Now, new ~org-table-row~ face is used on the whole table row lines,
+including indentation and the final newline. This face, by default,
+inherits from ~org-table~ face.
+
+If the new behavior is not desired, ~org-table-row~ face can be
+changed to inherit from ~default~ face.
+
+~org-table~ takes precedence over ~org-table-row~ for the parts of
+table rows without indentation and newline.
+
 *** =ox-latex=: ~org-latex-line-break-safe~ is deprecated
 
 ~org-latex-line-break-safe~ constant was previously introduced to deal

lisp/org-faces.el

@@ -389,6 +389,10 @@ changes."
   "Face used for tables."
   :group 'org-faces)
 
+(defface org-table-row '((t :inherit org-table))
+  "Face used to fontify whole table rows (including newlines and indentation)."
+  :group 'org-faces)
+
 (defface org-table-header '((t :inherit org-table
 			       :background "LightGray"
 			       :foreground "Black"))

lisp/org.el

@@ -5849,7 +5849,8 @@ needs to be inserted at a specific position in the font-lock sequence.")
 	    (2 (org-get-level-face 2))
 	    (3 (org-get-level-face 3)))
 	  ;; Table lines
-	  '("^[ \t]*\\(\\(|\\|\\+-[-+]\\).*\\S-\\)"
+	  '("^[ \t]*\\(\\(|\\|\\+-[-+]\\).*\\S-\\)\n?"
+            (0 'org-table-row t)
 	    (1 'org-table t))
 	  ;; Table internals
 	  '("^[ \t]*|\\(?:.*?|\\)? *\\(:?=[^|\n]*\\)" (1 'org-formula t))