[Bugs] #4830 Sugar UNSP: Icon from Gnome theme is displayed in a activity toolbar on F21

[Sugar Labs Bugs]

#4830: Icon from Gnome theme is displayed in a activity toolbar on F21
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  Reporter:  godiard                    |            Owner:
      Type:  defect                     |           Status:  new
  Priority:  Unspecified by Maintainer  |        Milestone:  Unspecified
 Component:  Sugar                      |          Version:  Unspecified
  Severity:  Unspecified                |       Resolution:
  Keywords:                             |  Distribution/OS:  Unspecified
Bug Status:  Unconfirmed                |
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Comment (by godiard):

 asking in GimpNet #gtk+, mclassen pointed to
 http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-
 latest.html

 A suspecting paragraph is:
 "Implementation Notes

 The algorithm as described in this document works by always looking up
 filenames in directories (a stat in unix terminology). A good
 implementation is expected to read the directories once, and do all
 lookups in memory using that information.

 This caching can make it impossible for users to add icons without having
 to restart applications. In order to handle this, any implementation that
 does caching is required to look at the mtime of the toplevel icon
 directories when doing a cache lookup, unless it already did so less than
 5 seconds ago. This means that any icon editor or theme installation
 program need only to change the mtime of the the toplevel directory where
 it changed the theme to make sure that the new icons will eventually get
 used."

 Anyway, I have tried:

 {{{
 diff --git a/src/sugar3/activity/activity.py
 b/src/sugar3/activity/activity.py
 index d56c620..640c31c 100644
 --- a/src/sugar3/activity/activity.py
 +++ b/src/sugar3/activity/activity.py
 @@ -290,7 +290,10 @@ class Activity(Window, Gtk.Container):
          """
          # Stuff that needs to be done early
          icons_path = os.path.join(get_bundle_path(), 'icons')
 -        Gtk.IconTheme.get_default().append_search_path(icons_path)
 +        icon_theme = Gtk.IconTheme.get_default()
 +        icon_theme.prepend_search_path(icons_path)
 +        os.utime(icons_path, None)
 +        icon_theme.rescan_if_needed()
 }}}

 but didn't solve the problem.
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Ticket URL: <http://bugs.sugarlabs.org/ticket/4830#comment:2>
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