Automatic channel category sorting (#30866)

* Automatic channel category sorting

* Fix types

* AIed

* Fix issue where categories are updated for all users

* Move all logic to server, clean up

* PR feedback

* Fix lint

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Co-authored-by: Mattermost Build <build@mattermost.com>

server/config/client.go

@@ -100,6 +100,7 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 	props["DisableRefetchingOnBrowserFocus"] = strconv.FormatBool(*c.ExperimentalSettings.DisableRefetchingOnBrowserFocus)
 	props["DisableWakeUpReconnectHandler"] = strconv.FormatBool(*c.ExperimentalSettings.DisableWakeUpReconnectHandler)
 	props["UsersStatusAndProfileFetchingPollIntervalMilliseconds"] = strconv.FormatInt(*c.ExperimentalSettings.UsersStatusAndProfileFetchingPollIntervalMilliseconds, 10)
+	props["ExperimentalChannelCategorySorting"] = strconv.FormatBool(*c.ExperimentalSettings.ExperimentalChannelCategorySorting)
 
 	// Here we set the new option, but we also send the old FeatureFlag property for backwards compatibility on mobile < 2.27
 	props["EnableCrossTeamSearch"] = strconv.FormatBool(*c.ServiceSettings.EnableCrossTeamSearch)