Changes since tag v1.6-beta2

commit 9fa4583c90d1bc260fc5de74c2a797d9bde14ac4
Author: Ethan Centaurai <ethancentaurai@outlook.com>
Date:   Fri Jun 21 19:27:44 2019 +0100

    Remove some more unused code.

commit 155b9188229df36148b51fd658b6e26db4f61d7f
Author: Ethan Centaurai <ethancentaurai@outlook.com>
Date:   Fri Jun 21 19:24:48 2019 +0100

    Remove unused code.
    
    WorldMapButton and WorldMapTooltip no longer exist.

