Refactoring

Refactor - Use store instead of localstorage for tokens and IDs. Moved close button into a component. Minor styling changes.

frontend/src/components/CloseButton.vue

+<template>
+    <div>
+        <div
+            id="line1"
+            class="line"
+        />
+        <div
+            id="line2"
+            class="line"
+        />
+    </div>
+</template>
+
+<script>
+export default {
+    name: 'CloseButton'
+}
+</script>
+
+<style scoped>
+    .line {
+        background-color: gray;
+        height: 3px;
+        width: 25px;
+        cursor: pointer;
+    }
+        #line1 {
+        transform: translateY(3px) rotate(45deg);
+    }
+        #line2 {
+        transform: rotate(-45deg);
+    }
+</style>