chore: import upstream snapshot with attribution

gray-theme/edit_overlay.cgi

@@ -0,0 +1,24 @@
+#!/usr/local/bin/perl
+# Show a form for changing the theme overlay
+
+require "gray-theme/gray-theme-lib.pl";
+
+# Get the user and themes
+&foreign_require("acl", "acl-lib.pl");
+@overlays = &list_virtualmin_theme_overlays();
+($user) = grep { $_->{'name'} eq $base_remote_user } &acl::list_users();
+$user || &error($text{'overlay_euser'});
+$overlay = $current_themes[1];
+
+&ui_print_header(undef, $text{'overlay_title'}, "");
+
+print &ui_form_start("save_overlay.cgi");
+print $text{'overlay_desc'},"<p>\n";
+print "<b>$text{'overlay_msg'}</b>\n";
+print &ui_select("overlay", $overlay,
+	 [ [ "", $text{'overlay_none'} ],
+	   map { [ $_->{'dir'}, $_->{'desc'} ] } @overlays ]),"<br>\n";
+print &ui_form_end([ [ undef, $text{'overlay_ok'} ] ]);
+
+&ui_print_footer("right.cgi", $text{'right_return'});
+