Floating containers are not considered when reordering #186

Steps to reproduce
1 Create three workspaces [1, 2, 3] with 2 and 3 only having floating windows
2 Close the floating window in 2
3 Move to another workspace

Intented result
The floating window in 3 should be moved to 2 and and resulting workspace would be [1, 2]

Actual result
The floating window stays in 3 and the workspace still leaves a gap ([1, 3])