Add iconBackgroundColor cluster preference type

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

packages/core/src/common/cluster-types.ts

@@ -105,6 +105,7 @@ export interface ClusterPreferences extends ClusterPrometheusPreferences {
    * cleared by preferences.
    */
   icon?: string | null;
+  iconBackgroundColor?: string;
   httpsProxy?: string;
   hiddenMetrics?: string[];
   nodeShellImage?: string;