Gdp 4.2.16 - Refactor Unity utilities tools to be windowed menu instead of prefabs

I refactors both scripts so it can work both as prefabs (monobehaviour) and windowed script by having shared logic. also cancelled the positions in rooms slide (last one as its currently inaccurate for some i think)

requested review from @mhz1g21

assigned to @mhby1g21

@mhz1g21 can u check the changes and approve if its alright so i can merge?

approved this merge request

approved this merge request

mentioned in commit 258c81d0

merged