Rework typescript to use modules

web UI now uses modules, and relies less on bodge to make things work.
Also fixes an issue where invites where "failed to send to xx" appeared
in invite form.

ts/modules/bs5.ts

@@ -0,0 +1,37 @@
+declare var bootstrap: any;
+
+class Modal implements BSModal {
+    el: HTMLDivElement;
+    modal: any;
+
+    constructor(id: string, find?: boolean) {
+        this.el = document.getElementById(id) as HTMLDivElement;
+        if (find) {
+            this.modal = bootstrap.Modal.getInstance(this.el);
+        } else {
+            this.modal = new bootstrap.Modal(this.el);
+        }
+        this.el.addEventListener('shown.bs.modal', (): void => document.body.classList.add("modal-open"));
+    };
+
+    show(): void { this.modal.show(); };
+    hide(): void { this.modal.hide(); };
+}
+
+export class BS5 implements Bootstrap {
+    triggerTooltips: tooltipTrigger = function (): void {
+        const checkboxes = [].slice.call(document.getElementById('settingsContent').querySelectorAll('input[type="checkbox"]'));
+        for (const i in checkboxes) {
+            checkboxes[i].click();
+            checkboxes[i].click();
+        }
+        const tooltips = [].slice.call(document.querySelectorAll('a[data-toggle="tooltip"]'));
+        tooltips.map((el: HTMLAnchorElement): any => {
+            return new bootstrap.Tooltip(el);
+        });
+    };
+
+    newModal: ModalConstructor = function (id: string, find?: boolean): BSModal {
+        return new Modal(id, find);
+    };
+};