added horizontal lines

src/ui/src/assets/css/_slide.scss

@@ -122,6 +122,12 @@
 		color: color(hightlight);
 	}
 
+	hr {
+		display: block;
+		border: 0.5px solid color(hightlight);
+		width: 100%;
+	}
+
 	pre {
 		//font-size: 0.3em;
 		width: 90%;

src/ui/src/components/SlideItem.js

@@ -64,6 +64,8 @@ const SlideItem = ({item}) => {
 						: null}
 					</span>
 				)
+			case "hr":
+				return <hr />
 			case "blockquote":
 				return <blockquote><Children items={item.tokens} /></blockquote>
 			case "paragraph":