The check failed randomly after script reloading an dissued the following error:
```
00:19:37.789 ]: [Error] Exception has been thrown during Window.OnDraw.
Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
[ 00:19:37.805 ]: [Warning] Exception has been thrown during Window.OnUpdate. Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
Stack strace:
at FlaxEditor.GUI.Tabs.Tabs.get_SelectedTab() in /home/me/Flax/FlaxEngine/Source/Editor/GUI/Tabs/Tabs.cs:line 242
```
