Library and Board managers haven't close button (X) in Fedora 21 (64 bits)/Gnome 3.14

[q2dg]

...So I can't close its modal windows unless I right-click over it to show system contextual menu and select "Close" from it. It's a nuisance

[ffissore]

This is new to me: can you attach a screenshot?

[q2dg]

Yes!
Here they are

[ffissore]

Ok. Wow. No buttons. Uhm.. Anyway, if you press ESC once or twice, the modal will close

[ffissore]

It's a workaround. I'll see where I can put a close button

[q2dg]

Ok. Thanks!

[sej7278]

Same on Debian Jessie 64-Bit with Gnome 3.14, escape works, but there's no icon

[ffissore]

Fixed. Fix will be available with the next hourly build http://www.arduino.cc/en/Main/Software#hourly