File read-only status bar message doesn't change position after window resize

I have tested it on 0.4~r910 from the official Ubuntu repository (on Ubuntu 14.04 x64)

When we open a read-only file, there is a message in status bar: File is in readonly mode.

As window is resized (either by mouse at it's border or maximized) the widget with the label doesn't change it's position ending up in the middle of the content if window size increases (or disappears if window gets smaller).

Screenshot is attached.

scribes -i output:

========================================================
System Info: ('Linux', 'olegst-desktop', '3.13.0-65-generic', '#106-Ubuntu SMP Fri Oct 2 22:08:27 UTC 2015', 'x86_64')
Python Version: 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2]
System Byteorder: little
Python Modules: ('__builtin__', '__main__', '_ast', '_bisect', '_codecs', '_collections', '_functools', '_heapq', '_io', '_locale', '_md5', '_random', '_sha', '_sha256', '_sha512', '_socket', '_sre', '_struct', '_symtable', '_warnings', '_weakref', 'array', 'binascii', 'cPickle', 'cStringIO', 'cmath', 'errno', 'exceptions', 'fcntl', 'gc', 'grp', 'imp', 'itertools', 'marshal', 'math', 'operator', 'posix', 'pwd', 'select', 'signal', 'spwd', 'strop', 'sys', 'syslog', 'thread', 'time', 'unicodedata', 'xxsubtype', 'zipimport', 'zlib')
========================================================
Scribes Version: 0.4-dev-build910
Dbus Version: (1, 2, 0)
GTK+ Version: (2, 24, 23)
PyGTK Version: (2, 24, 0)
Psyco Not Installed
========================================================
Running Instance: 1
========================================================
Python Path: /usr/lib/python2.7/dist-packages
Plugin Path: /usr/lib/scribes/GenericPlugins
Data Path: /usr/share/scribes
Executable Path: /usr/bin
========================================================