Bug#751860: xchat-gnome: Channel views scoll back on activity when they are not in the foreground

[Sam Morris]

Source: xchat-gnome
Version: 1:0.30.0~git20131003.d20b8d-2
Severity: serious
Justification: renders package unusable

1. Join #one and #two
2. On #one, cause enough activity to fill the window and require
   scrolling; make sure the view of #one is scrolled to the bottom
3. Set the focus to #two
4. With another client, speak on #one
5. Set the focus to #one
6. The channel should be scrolled to the bottom so that the new activity
   is visible; but instead, the view is scrolled back some way;
   additional user input is required to scroll to the bottom before the
   new activity is visible

This was reported in Ubuntu
<https://bugs.launchpad.net/ubuntu/+source/xchat-gnome/+bug/1272455> but
there's no fix available.

-- System Information:
Debian Release: 7.5
  APT prefers stable-updates
  APT policy: (550, 'stable-updates'), (550, 'stable'), (530, 'testing'), (520, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.14-0.bpo.1-686-pae (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash