Added Roles, User Management, fixed bugs, added FlexTable component (should be renamed to GridTable), other table components and test code should be removed down the line, added admin function to fix broken data structures.

imports/ui/Admin.svelte

@@ -0,0 +1,8 @@
+<script>
+	import {Meteor} from "meteor/meteor";
+
+	const fixRecords = () => {Meteor.call("admin.fixRecords");}
+</script>
+<div class="container">
+	<button type="button" on:click={fixRecords}>Fix Records</button>
+</div>