Move pgMustard to optimization section

README.md

@@ -130,6 +130,8 @@ For Database Management
 
 ### Optimization
 * [PgHero](https://github.com/ankane/pghero) - PostgreSQL insights made easy.
+* [pgMustard](https://www.pgmustard.com/) - A modern user interface
+for `EXPLAIN`, that also provides performance tips (Commercial Software).
 * [pgtune](https://github.com/gregs1104/pgtune/) - PostgreSQL configuration wizard.
 * [pgtune](https://github.com/le0pard/pgtune) - Online version of PostgreSQL configuration wizard.
 * [pgconfig.org](https://github.com/sebastianwebber/pgconfig) - PostgreSQL Online Configuration Tool (also based on pgtune).
@@ -154,8 +156,6 @@ For Database Management
 * [PGInsight](http://pginsight.io/) - CLI tool to easily dig deep inside your PostgreSQL database.
 * [pg_insights](https://github.com/lob/pg_insights) - Convenient SQL for monitoring Postgres database health.
 * [pgloader](https://github.com/dimitri/pgloader) - Loads data into PostgreSQL using the COPY streaming protocol, and does so with separate threads for reading and writing data.
-* [pgMustard](https://www.pgmustard.com/) - A modern user interface
-for `EXPLAIN ANALYSE`, that also provides performance tips (Commercial Software).
 * [pgpool-II](http://www.pgpool.net/mediawiki/index.php/Main_Page) - Middleware that provides connection pooling, replication, load balancing and limiting exceeding connections.
 * [pgsync](https://github.com/ankane/pgsync) - Tool to sync PostgreSQL data to your local machine.
 * [PGXN client](https://github.com/pgxn/pgxnclient) - Command line tool to interact with the PostgreSQL Extension Network