This module is deprecated because it's now unnecessary - FoundryVTT includes this behavior as standard now (as of V11).
When trying to render a sheet window that is already opened, maximize it and bring it in front of other sheets (instead
of doing nothing).
This applies to all types of "sheets" (item, actor, journal, token configuration, etc).
Compare this to the default behavior, which may frustrate some users:
This tiny module also includes a settings option to disable it for the current user.