Unable to move asset due to ok button disabled

Please see attached screenshot-2 in issue CMS7-3617

I wanted to move a file out.log (1) from 'Assets > test' to 'Assets > hippos' and noticed the OK button was disabled (2).

The OK button is enabled if I chose another target such as Documents > articles (3).

But note that when you first click on the Documents slider that button is still grayed out, as it should be. Then select a folder (click on articles for example) and see the button becomes enabled. Click once more on that same folder, notice the highlight disappears, the OK button is still enabled, use it. The target will be the folder you had initially selected. This might be a different issue which I will log as such if you ask so.