Experimental Sidebar: "Create New Channel" and "Browse Channels" options visible to guest users

Description

"Create New Channel" and "Browse Channels" are visible to guest users.
If the guest attempts to create the channel, the user will get an error saying they don't have the appropriate permissions.
If the guest attempts to browse channels, the More Channels modal will show "No more channels to join".

Steps:
1. Log in as a guest user
2. Go to Account Settings > Sidebar and enable Experimental Sidebar Features
3. In the sidebar, click on the "+" button

Observed: "Create New Channel" and "Browse Channels" are visible
Expected:
1. "Create New Channel" and "Browse Channels" should not be available to the guest, the "+" icon should be hidden
If "Create Channels" permission is enabled for Guests, then the option to create a new channel should be show

QA Test Steps

See description.

Mana

None

Assignee

Devin Binnie

QA Assignee

Ogi Marusic

Reporter

Ogi Marusic

Epic Link

None

Fix versions

Mattermost Team

Apps

Sprint

None

Labels

QA Testing Areas

LHS

GitHub Issue

None

Components

None

Severity

None
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