Can spawn on blocked FOs

[galzohar]

If you choose to spawn on an FO that is currently not blocked and it then becomes blocked, you can still spawn on it. I'm assuming this is a bug and not intended, and shouldn't be too hard to fix.

Also, the deployment menu is rather buggy as a whole, sometimes not letting you close it (when opened from main base rather than after respawn), and sometimes the "OK" button not working requiring you to click cancel and then OK again, usually when changing your desired spawn point.