#1178 Revert Home instead of _is already open_

[Pablo AB]

Sometimes we open a Home, change some things, and then try to revert all those changes and go back to the last saved state. For that use case would be nice a Revert option, or just change the behavior on File > Open recent home > Click on same home as the opened (which should be somehow highlighted, BTW). Instead of showing a Home {path} is already open msgbox would be great to warn the user that the selected home is already open, and if he proceed all the unsaved changes will be lost.