Add new ctrl/cmd - k search modal (#2467)

* add new search modal

* remove search modal from searchTab

* fix member avatar load for space with 2 member

* use media authentication when rendering avatar

* fix hotkey for macos

* add @ in username

* replace subspace minus separator with em dash

src/app/pages/client/sidebar/index.ts

@@ -5,3 +5,4 @@ export * from './InboxTab';
 export * from './ExploreTab';
 export * from './SettingsTab';
 export * from './UnverifiedTab';
+export * from './SearchTab';