restructure presentation layer

- Move most GUI related code to /presentation
- Move components to /components (separate from bootstrap and style)
- Move shared components helpers to /components/shared
- Rename Bootstrapping to bootstrapping to enforce same naming
  convention in /presentation

src/presentation/components/Shared/Throttle.ts

@@ -0,0 +1,30 @@
+export function throttle<T extends []>(
+    callback: (..._: T) => void, wait: number,
+    timer: ITimer = NodeTimer): (..._: T) => void {
+    let queuedToRun: ReturnType<typeof setTimeout>;
+    let previouslyRun: number;
+    return function invokeFn(...args: T) {
+        const now = timer.dateNow();
+        if (queuedToRun) {
+            queuedToRun = timer.clearTimeout(queuedToRun) as undefined;
+        }
+        if (!previouslyRun || (now - previouslyRun >= wait)) {
+            callback(...args);
+            previouslyRun = now;
+        } else {
+            queuedToRun = timer.setTimeout(invokeFn.bind(null, ...args), wait - (now - previouslyRun));
+        }
+    };
+}
+
+export interface ITimer {
+    setTimeout: (callback: () => void, ms: number) => ReturnType<typeof setTimeout>;
+    clearTimeout: (timeoutId: ReturnType<typeof setTimeout>) => void;
+    dateNow(): number;
+}
+
+const NodeTimer: ITimer = {
+    setTimeout: (callback, ms) => setTimeout(callback, ms),
+    clearTimeout: (timeoutId) => clearTimeout(timeoutId),
+    dateNow: () => Date.now(),
+};