Reapply "Update docs for PICARD-2580(keyboard shortcut for Show more details)"

This reverts commit 0c1a2b4.

Author: phw

about_picard/acknowledgements.rst

@@ -26,6 +26,7 @@ Contributors include (in alphabetic surname order):
 - Laurent Monin
 - Akash Nagaraj
 - Frederik "Freso" S. Olesen
+- Shubham Patel
 - Guntbert Reiter
 - Theodore Fabian Rudy
 - Suryansh Shakya

appendices/keyboard_shortcuts.rst

@@ -109,6 +109,7 @@ Metadata view
    "Remove selected tag", :kbd:`Alt+Shift+R` |br| |nl| :kbd:`Del`, :kbd:`⌥+⇧+R` |br| |nl| :kbd:`Del` |br| |nl| :kbd:`⌘+⌫`
    "Copy selected tag value", :kbd:`Ctrl+C`, :kbd:`⌘+C`
    "Paste to selected tag value", :kbd:`Ctrl+V`, :kbd:`⌘+V`
+   "Show more details", :kbd:`Ctrl+Shift+I`, :kbd:`⌘+⇧+I`
 
 Other
 +++++