Floating containers are not considered when reordering

[lewisbolaton]

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])

i3ipc-python/examples/workspace_renumber.py

Lines 46 to 49 in 1945dfc

	for c in containers:
	for i in c.leaves():
	i.command("move container to workspace %s" % least_number)
	least_number += 1