Description:
gnome-tweak-tool fails to start if ~/.icons directory does not exist with traceback:

Traceback (most recent call last):
File "/usr/bin/gnome-tweak-tool", line 81, in <module>
MainWindow()
File "/usr/bin/gnome-tweak-tool", line 46, in __init__
model)
File "/usr/lib/python2.7/site-packages/gtweak/tweakview.py", line 38, in __init__
self._model.load_tweaks()
File "/usr/lib/python2.7/site-packages/gtweak/tweakmodel.py", line 97, in load_tweaks
mods = __import__("gtweak.tweaks", globals(), locals(), tweak_files, 0)
File "/usr/lib/python2.7/site-packages/gtweak/tweaks/tweak_interface.py", line 92, in <module>
IconThemeSwitcher(size_group=sg),
File "/usr/lib/python2.7/site-packages/gtweak/tweaks/tweak_interface.py", line 51, in __init__
[(t, t) for t in self._get_valid_icon_themes()],
File "/usr/lib/python2.7/site-packages/gtweak/tweaks/tweak_interface.py", line 59, in _get_valid_icon_themes
for t in os.listdir(thdir):
OSError: [Errno 2] No such file or directory: '/home/jesus/.icons'


Additional info:
* version 3.0.2-1


Steps to reproduce:

$ rm -r .icons
$ gnome-tweak-tool