[FIX] Anonymous chat read

[sampaiodiego]

Closes #14701
Closes #14712
Closes #14764

• Fix loading chat rooms
• Fix loading Directory page

Still doesn't fix when first hit is on a room (i.e.: http://localhost:3000/channel/general). But this is an old issue (present since 0.74.3 at least).

[ubergeekzone]

Fix for UI Sidebar Item for Anonymous User, Allows rooms to load in side bar that have messages already. This stops the _id undefined error and allows normal functionality.

File: app/ui-sidenav/client/sidebaritem.js

var user = {};
if(Meteor.userId()) {
   user = this.user._id;
}

const sender = user === currentData.lastMessage.u._id ? t('You') : otherUser;```

[sampaiodiego]

thanks @ubergeekzone .. that was a great catch 👍