Implemented negative filters in back-end, added basic fixed filters settings dialog.

renderer/init-client.js

@@ -0,0 +1,14 @@
+import Cookies from 'js-cookie';
+
+const cookies = Cookies.withConverter({
+	write: (value) => value,
+});
+
+export default function init(_pageContext) {
+	// update tag filter to prevent unexpected expiry
+	const storedTags = cookies.get('tags');
+
+	if (storedTags) {
+		cookies.set('tags', storedTags, { expires: 400 });
+	}
+}