Change structure highlight to css filter

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

src/components/app.vue

@@ -74,6 +74,12 @@
       }
     },
     async created () {
+      document.addEventListener('wheel', event => {
+        event.preventDefault()
+      }, {passive: false})
+      document.addEventListener('touchmove', event => {
+        event.preventDefault()
+      }, {passive: false})
       if (!window.cordova) {
         const confText = await fetch('./conf/conf.yaml')
           .then((mod) => { return mod.text() })