- Refine boxedcolor macro.

- Tentatively replace nowidow package with lua-widow-control.

packages/Layout.sty

@@ -41,10 +41,15 @@
 \setlength{\contentwidth}{\textwidth + \marginparsep + \marginparwidth}
 
 % Widow & Orphan control.
-\RequirePackage[
-	defaultlines = 4,
-	all,
-]{nowidow}
+% \RequirePackage[
+% 	defaultlines = 4,
+% 	all,
+% ]{nowidow}
+
+\RequirePackage{lua-widow-control}
+\ifthenelse{\boolean{isDraft}}{
+	\lwcdraft{draft}
+}{}
 
 % Paragraph formatting.
 \setlength{\parindent}{0pt}