[RES][6.00 Beta 1] Custom Game Start menu "soft crashes" when adding property - Fix in a build after beta 2.

[SHOT(by)GUN]

"soft crash" = as in no buttons work anymore and can't export settings

Adding station or fleet in custom game start and then viewing the property screen again will "soft crash" the whole custom game start menu.

One esc will escape the bug "visually", but saving will not work at all.
Two esc presses will escape back to main menu and the custom game start menu works again with reseted settings.

Added video to reproduce bug: https://www.youtube.com/watch?v=NE6Da3lwH0A

[SHOT(by)GUN]

Since ship buying bug was Linux specific I'll add that this was on Linux too.

[SHOT(by)GUN]

Steps to reproduce bug in Beta 2:

1. Property -> Add fleet -> Any ship
2. Move fleet to another sector
3. Click Universe
4. Property -> Edit fleet ship -> Confirm
5. Click Universe
Custom menu now soft crashed state.

[florianlt]

Fixed in an upcoming build.