move plugin logic to Plugins controller

dist/reveal.css

@@ -1,5 +1,5 @@
 /*!
-* reveal.js 4.0.0-dev (Fri Mar 06 2020)
+* reveal.js 4.0.0-dev (Sat Mar 07 2020)
 * https://revealjs.com
 * MIT licensed
 *

dist/reveal.min.js

@@ -5,4 +5,4 @@
 *
 * Copyright (C) 2020 Hakim El Hattab, https://hakim.se
 */
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