Copied a few changes from default.latex to default.beamer

default.beamer

@@ -108,7 +108,7 @@ $if(author-meta)$
             pdfauthor={$author-meta$},
 $endif$
 $if(keywords)$
-            pdfkeywords={$for(keywords)$$keywords$$sep$; $endfor$},
+            pdfkeywords={$for(keywords)$$keywords$$sep$, $endfor$},
 $endif$
 $if(colorlinks)$
             colorlinks=true,
@@ -192,7 +192,7 @@ $endif$
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
 $if(numbersections)$
-\setcounter{secnumdepth}{5}
+\setcounter{secnumdepth}{$if(secnumdepth)$$secnumdepth$$else$5$endif$}
 $else$
 \setcounter{secnumdepth}{0}
 $endif$