Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/db/migrations/postgres/000088_remaining_migrations.up.sql

@@ -0,0 +1,28 @@
+DROP TABLE IF EXISTS jobstatuses;
+
+DROP TABLE IF EXISTS passwordrecovery;
+
+DO $$
+<<migrate_theme>>
+DECLARE
+    col_exist boolean := false;
+BEGIN
+    SELECT count(*) != 0 INTO col_exist
+    FROM information_schema.columns
+    WHERE table_name = 'users'
+    AND table_schema = current_schema()
+    AND column_name = 'themeprops';
+
+    IF col_exist THEN
+		INSERT INTO
+			preferences(userid, category, name, value)
+		SELECT
+			id, '', '', themeprops
+		FROM
+			users
+		WHERE
+			users.themeprops != 'null';
+
+        ALTER TABLE users DROP COLUMN themeprops;
+    END IF;
+END migrate_theme $$;