[map editor] pasting or moving a sector inside another sector overshadows it

[FlykeSpice]

SLADE Version: latest master Operating System: Linux

Issue Details: If you copy a sector and paste it inside a bigger sector and then try to select the pasted sector, it actually highlight the outer sector along with the pasted sector, that is, the pasted sector gets overshadowed by the outer one, rendering unable to edit it on 2d mode, very same thing happens if you move a outside sector to inside.

[FlykeSpice]

test.wad.zip

EDIT: Ok so I found you can circumvent the bug by just creating two lines inside the containing sector right after you pasted.