window-manager: better handling no-clusters state

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/cluster-manager/clusters-menu.scss

@@ -42,7 +42,7 @@
     margin: var(--flex-gap) 0;
 
     &:empty {
-      display: none;
+      margin-bottom: 0;
     }
   }
 

src/renderer/config.store.ts

@@ -3,8 +3,6 @@ import { observable, when } from "mobx";
 import { autobind, interval } from "./utils";
 import { apiBase } from "./api";
 
-// todo: remove, merge with common/user-store.ts
-
 @autobind()
 export class ConfigStore {
   protected updater = interval(60, this.load);