Change structure highlight to css filter

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

src/components/app.vue

@@ -74,12 +74,6 @@
       }
     },
     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() })