Bug of the Variable window

[vadkos12]

Hello,

I can't turn on the variables window in the normal editor mode in 5.3.1.0.
video - http://screencast.com/t/mPiVKksRH

 

[rostonix]

http://i.gyazo.com/64148b552b999a42ad1cb5381d7f7867_1.png

 

[vadkos12]

Thanks a lot.