Improve fullscreen, add fullscreen-collapse

More youtube-esque

Gruntfile.js

@@ -2108,6 +2108,7 @@ module.exports = function(grunt) {
             'filter': 0x0066,
             'first-page': 0x005b,
             'fullscreen': 0x0046,
+            'fullscreen-collapse': 0x0047,
             'hierarchy': 0x0068,
             'last-page': 0x005d,
             'lock': 0x004c,

source/common/functional/fullscreen-collapse.svg

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 22.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<path d="M25.7,21.9v5.8h-1.9V20h7.8v1.9H25.7z M31.5,12.3h-7.8V4.5h1.9v5.8h5.8V12.3z M6.3,27.8v-5.8H0.5V20h7.8v7.8
+	C8.2,27.8,6.3,27.8,6.3,27.8z M6.3,10.3V4.5h1.9v7.8H0.5v-1.9C0.5,10.3,6.3,10.3,6.3,10.3z"/>
+</svg>

source/common/functional/fullscreen.svg

-<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32"><path d="M29.562 25.82v-5.812H31.5v7.75h-7.75V25.82h5.812zM23.75 4.507h7.75v7.75h-1.938V6.445H23.75V4.507zm-21.312 15.5v5.812H8.25v1.938H.5v-7.75h1.938zm0-13.563v5.813H.5v-7.75h7.75v1.937H2.438zm1.937 16.469V9.351h23.25v13.562H4.375z"/></svg>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 22.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<path d="M29.6,25.8V20h1.9v7.8h-7.8v-1.9H29.6z M23.8,4.5h7.8v7.8h-1.9V6.4h-5.8V4.5z M2.4,20v5.8h5.8v1.9H0.5V20
+	C0.5,20,2.4,20,2.4,20z M2.4,6.4v5.8H0.5V4.5h7.8v1.9C8.2,6.4,2.4,6.4,2.4,6.4z"/>
+</svg>