Adding upstream version 5.3.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

site/static/docs/5.3/assets/img/favicons/manifest.json

@@ -0,0 +1,20 @@
+{
+  "name": "Bootstrap",
+  "short_name": "Bootstrap",
+  "icons": [
+    {
+      "src": "android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "start_url": "/?utm_source=a2hs",
+  "theme_color": "#7952b3",
+  "background_color": "#7952b3",
+  "display": "standalone"
+}

site/static/docs/5.3/assets/img/favicons/safari-pinned-tab.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="192" height="192" fill="none"><path fill="#000" fill-rule="evenodd" d="M39.878 20c-10.955 0-19.06 9.59-18.698 19.988.349 9.99-.104 22.93-3.361 33.48C14.55 84.052 9.026 90.756 0 91.615v9.719c9.026.86 14.55 7.563 17.819 18.147 3.257 10.551 3.71 23.491 3.361 33.48-.362 10.399 7.743 19.988 18.698 19.988h112.258c10.955 0 19.06-9.589 18.697-19.988-.348-9.989.104-22.929 3.362-33.48 3.268-10.584 8.779-17.287 17.805-18.147v-9.719c-9.026-.86-14.537-7.563-17.805-18.147-3.258-10.55-3.71-23.49-3.362-33.48C171.196 29.589 163.091 20 152.136 20H39.878zm88.665 94.15c0 14.32-10.68 23.002-28.404 23.002H68.713a2 2 0 01-2-2V57.797a2 2 0 012-2h31.253c14.779 0 24.478 8.006 24.478 20.296 0 8.626-6.524 16.35-14.837 17.703v.451c11.315 1.24 18.936 9.078 18.936 19.903zM96.848 66.114H79.644v24.3h14.491c11.2 0 17.377-4.51 17.377-12.573 0-7.555-5.311-11.727-14.664-11.727zm-17.204 33.941v26.78h17.84c11.661 0 17.838-4.68 17.838-13.475s-6.35-13.305-18.59-13.305H79.645z" clip-rule="evenodd"/></svg>