Make mini timelines editable.

src/components/timeline.ts

@@ -1,5 +1,5 @@
 // TODO: When a media viewer is first loaded the selected child won't work (because the underlying carousel has not yet rendered)
-// TODO: Make minitimeline configurable in the editor
+// TODO: time on recording != time on timeline in media viewer after scrolling around
 
 import { CSSResultGroup, html, LitElement, TemplateResult, unsafeCSS } from 'lit';
 import { customElement, property } from 'lit/decorators.js';