fix footer and menu

• Fixing the footer removal on the title page slide.
• Moving the menu button to the top-left corner.
• Centering the title of each slide.

Fixes #1 (closed)

runtime/theme/uab-rc.css

@@ -131,7 +131,8 @@ div.reveal div.slides div.quarto-title-authors {
 
 /* headers */
 .reveal h1,
-.reveal h2 .reveal h3,
+.reveal h2,
+.reveal h3,
 .reveal h4,
 .reveal h5,
 .reveal h6 {