PLT-7116/PLT-7126 Some final release fixes (#6933)

* Some final release fixes

* Fix team switching with image in channel bug

webapp/yarn.lock

@@ -5043,7 +5043,7 @@ math-expression-evaluator@^1.2.14:
 
 mattermost-redux@mattermost/mattermost-redux#webapp-4.0:
   version "0.0.1"
-  resolved "https://codeload.github.com/mattermost/mattermost-redux/tar.gz/2f816b1b1374f7d10f7c160cd392f323d8cebcc6"
+  resolved "https://codeload.github.com/mattermost/mattermost-redux/tar.gz/a68c49c57130ed64e5a8fb3bdbd004ced437790b"
   dependencies:
     deep-equal "1.0.1"
     harmony-reflect "1.5.1"