Apply the user's tint once the MatrixClientPeg is moderately ready

Any earlier and we risk getting NPEs from the peg not existing.

Fixes https://github.com/vector-im/riot-web/issues/6424

src/MatrixClientPeg.js

@@ -26,6 +26,7 @@ import EventTimelineSet from 'matrix-js-sdk/lib/models/event-timeline-set';
 import createMatrixClient from './utils/createMatrixClient';
 import SettingsStore from './settings/SettingsStore';
 import MatrixActionCreators from './actions/MatrixActionCreators';
+import Tinter from "./Tinter";
 
 interface MatrixClientCreds {
     homeserverUrl: string,
@@ -128,6 +129,9 @@ class MatrixClientPeg {
             opts.lazyLoadMembers = true;
         }
 
+        const color_scheme = SettingsStore.getValue("roomColor");
+        Tinter.tint(color_scheme.primary_color, color_scheme.secondary_color);
+
         // Connect the matrix client to the dispatcher
         MatrixActionCreators.start(this.matrixClient);