[MM-48014] Auto-enable Apps Bar by moving EnableAppBar setting to DisableAppBar (#23010)

* auto-enable Apps Bar by moving EnableAppBar setting to DisableAppBar

* update playwright config

* remove EnableAppBar config setting to avoid confusion

* small fixes

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Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/config/client.go

@@ -55,7 +55,7 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 	// This setting is only temporary, so keep using the old setting name for the mobile and web apps
 	props["ExperimentalEnablePostMetadata"] = "true"
 
-	props["EnableAppBar"] = strconv.FormatBool(*c.ExperimentalSettings.EnableAppBar)
+	props["DisableAppBar"] = strconv.FormatBool(*c.ExperimentalSettings.DisableAppBar)
 
 	props["ExperimentalEnableAutomaticReplies"] = strconv.FormatBool(*c.TeamSettings.ExperimentalEnableAutomaticReplies)
 	props["ExperimentalTimezone"] = strconv.FormatBool(*c.DisplaySettings.ExperimentalTimezone)