Filters Redesign (#658)

* Add XCheckboxFilter

* Fix madara typo

* Change the branch name in config

* Add typing for madara popoularnovels filters

* Add preview and refactor PluginWrapper

* Add preview HTML sanitize and other improv.

* Web improvements + sanitizeHTML

* Add dark mode

* Add git run less to compile less

* Add less.js to remove the need for compiling less

test_web/static/md5Themes/themes.js

@@ -0,0 +1,14 @@
+// @ts-check
+/** @typedef {{backgroundColor:string, textColor:string}[]} Theme */
+
+/** @type {Theme} */
+window.themes = [
+    { backgroundColor: "#f5f5fa", textColor: "#111111" },
+    { backgroundColor: "#F7DFC6", textColor: "#593100" },
+    { backgroundColor: "#dce5e2", textColor: "#000000" },
+    { backgroundColor: "#292832", textColor: "#CCCCCC" },
+    {
+        backgroundColor: "#000000",
+        textColor: "#FFFFFFB3",
+    },
+];