Fix Settings/AllMedia in Account List context menu

- combine all settings-gathering when changing account since some
  functions await for SelectAccount
- give additional 50ms to switching to Gallery since there's a conflict
  of setState and async media query in Gallery.tsx
- resolves #4190
- resolves #4191

packages/frontend/src/ScreenController.tsx

@@ -138,13 +138,15 @@ export default class ScreenController extends Component {
     if (!dontStartIo) {
       await BackendRemote.rpc.startIo(accountId)
     }
-    runtime.setDesktopSetting('lastAccount', accountId)
-    BackendRemote.rpc.getSystemInfo().then(info => {
-      log.info('system_info', info)
-    })
-    BackendRemote.rpc.getInfo(accountId).then(info => {
-      log.info('account_info', info)
-    })
+    return Promise.all([
+      runtime.setDesktopSetting('lastAccount', accountId),
+      BackendRemote.rpc.getSystemInfo().then(info => {
+        log.info('system_info', info)
+      }),
+      BackendRemote.rpc.getInfo(accountId).then(info => {
+        log.info('account_info', info)
+      }),
+    ])
   }
 
   async unSelectAccount() {

packages/frontend/src/components/AccountListSidebar/AccountItem.tsx

@@ -99,7 +99,9 @@ export default function AccountItem({
         // set Timeout forces it to be run after react update
         setTimeout(() => {
           ActionEmitter.emitAction(KeybindAction.GlobalGallery_Open)
-        }, 0)
+          // NOTE(maxph): Gallery.tsx gets unmounted before receiving media data
+          // and breaks markdown, so here 50ms is a temprorary workaround for that
+        }, 50)
       },
     },
     {