Changes (as compared to 5.54) include:
* In the replication page a slave was not displaying indented compared to its master as it should if slave and master were running on same host.
* Fixed a multi-threading issue that in rare cases could crash MONyog if the Monitors page was viewed simultaneously in multiple browsers.
* Stability fixes for issues found during internal stress-testing and code review. No crash, slowdown ('hang') or similar was reported due to any of those, but it could theoretically happen under specific and rare circumstances.