#59 Left click for force check email doesn't work

[Telychko]

ENVIRONMENT:
Arch Linux.
Linux LenovoX121e 4.0.7-2-ARCH #1 SMP PREEMPT Tue Jun 30 07:50:21 UTC 2015 x86_64 GNU/Linux
XFCE-4.12

PREREQUISITES:
From documentation page:
Using gnubiff
You can invoke the configuration panel via the menu (right mouse button).
You can force mail checking by left-clicking on biff window or applet
You can mark your email as read by middle-clicking on biff window or applet
You can start you mail application by double right clicking on biff window or applet
You can read first line of a mail by left-clicking on its header

STEPS TO REPRODUCE:

1. Setup gnubiff and ensure that email successfully checked periodically.
2. Increase period of checking by 30m.
3. Send a mail to mailbox which checked by gnubiff.
4. Left click of mouse button on system-tray applet or gnubiff window.

EXPECTED RESULTS:
Initiated checking of mail box immediately.

ACTUAL RESULTS:
No reaction on left-clicking.