ssb: Add a manual theme color picker.

apps/ssb/tf-tab-news.js

@@ -7,7 +7,7 @@ import {
 	until,
 } from './lit-all.min.js';
 import * as tfrpc from '/static/tfrpc.js';
-import {styles} from './tf-styles.js';
+import {styles, generate_theme} from './tf-styles.js';
 
 class TfTabNewsElement extends LitElement {
 	static get properties() {
@@ -395,6 +395,9 @@ class TfTabNewsElement extends LitElement {
 			</div>`;
 		}
 		return cache(html`
+			<style>
+				${generate_theme()}
+			</style>
 			${this.render_sidebar()}
 			<div
 				style="margin-left: 2in; padding: 0px; top: 0; height: 100vh; max-height: 100%; overflow: auto; contain: layout"