merge spaces and better space management

1. Option to merge spaces. When I rename my space and the space already exists, it would be great if there was another option to "merge" these two spaces. I love to tidy up now and then.

2. When I want to drag a space from the top to a space as a subspace right at the bottom it is a long drag when I have many spaces. In the long run a own page to merge, divide or organize spaces would help.

Thanks for all the recent changes. :)