BUG: styler multiindex hiding indexes and columns alignment (#43649)

Author: attack68

doc/source/whatsnew/v1.4.0.rst

@@ -81,6 +81,7 @@ Styler
   - Naive sparsification is now possible for LaTeX without the multirow package (:issue:`43369`)
   - :meth:`Styler.to_html` omits CSSStyle rules for hidden table elements (:issue:`43619`)
   - Custom CSS classes can now be directly specified without string replacement (:issue:`43686`)
+  - Bug where row trimming failed to reflect hidden rows (:issue:`43703`)
 
 Formerly Styler relied on ``display.html.use_mathjax``, which has now been replaced by ``styler.html.mathjax``.