Use user's preferred font for inline code snippets too

Summary:
Use user's preferred font for inline code snippets,
like we already do for block code snippets.

Test Plan:
Set a non-default font in Settings → Display Preferences → Monospaced Font.
Make sure that it applies to both single-tick (inline) and triple-tick (block)
code snippets in comments.

For example, enter:

    42px Tahoma

Reviewers: O1 Blessed Committers, valerio.bozzolan

Reviewed By: O1 Blessed Committers, valerio.bozzolan

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Maniphest Tasks: T15682

Differential Revision: https://we.phorge.it/D25486

src/view/page/PhabricatorStandardPageView.php

@@ -413,8 +413,9 @@ final class PhabricatorStandardPageView extends PhabricatorBarePageView
       $font_css = hsprintf(
         '<style type="text/css">'.
         '.PhabricatorMonospaced, '.
-        '.phabricator-remarkup .remarkup-code-block '.
-          '.remarkup-code { font: %s !important; } '.
+        '.phabricator-remarkup .remarkup-code-block .remarkup-code, '.
+        '.phabricator-remarkup .remarkup-monospaced '.
+        '{ font: %s !important; } '.
         '</style>',
         $monospaced);
     }