Adding an option to the Sources filter from a remote Python scope doesn't work

Bug Description

self.scope = Unity.Scope.new ("/path/for/scope")
self.scope.props.sources.add_option('test','Test', None)

This code, from a remote Python scope, silently fails to add an option to the "Sources" filter.

This bug was fixed in the package libunity - 5.2.0-0ubuntu1

---------------
libunity (5.2.0-0ubuntu1) precise; urgency=low

* New upstream release.
- Dash: very high latency responding to input (LP: #828582)
- Adding an option to the Sources filter from a remote Python scope
doesn't work (LP: #916758)
- Dash - Genre filter category in the Music Lens should use a 3 column
layout (LP: #841902)
* debian/control:
- build with vala 0.14 and on python
* debian/libunity9.symbols:
- updated symbols
* -
-- Didier Roche <email address hidden> 2012年2月03日 11:38:26 +0100

This bug was fixed in the package unity - 5.2.0-0ubuntu1

---------------
unity (5.2.0-0ubuntu1) precise; urgency=low

* New upstream release.
- Unity needs a way to switch (tab) between windows on current workspace
(LP: #863399)
- compiz crashed with SIGSEGV in BamfLauncherIcon::NameForWindow()
(LP: #865840)
- Gradual degradation in desktop performance. (LP: #888039)
- compiz (unity) crashes with SIGSEGV when a window is minimized.
(LP: #918329)
- FavoriteStore external change support (LP: #681503)
- Launcher - Make Launcher left of screen reveal more responsive and less
prone to false positives (LP: #765819)
- Window auto-maximise functionality should be disabled on monitors with a
resolution above 1024 x 600 (LP: #797808)
- Dash: very high latency responding to input (LP: #828582)
- Dash - Behaviour of the 'All' button in the Dash filters broken in
several ways (LP: #841864)
- alt-tab - The app title in the top left of the top bar should change as
the alt-tab focus changes (LP: #855516)
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when a user presses and holds the Super key (LP: #855532)
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(LP: #860707)
- Dash - Remove Dash Home shortcut icons (LP: #885738)
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Launcher favorites (LP: #893214)
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- the unity wrapper should kill compiz before restarting it (LP: #919132)
- Launcher - Implement workspace/launcher cross interactions (LP: #690143)
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in the window spread (LP: #689733)
- Notification area ("system tray") missing when using dual monitors of
different sizes, with their bottoms aligned (LP: #778256)
- Clicking Nautilus launcher icon fails to open a Nautilus file explorer
window when copying a file and all other Nautilus windows are closed /
bamf should skip the taskbar (LP: #784804)
- Dash - the search box is not aligned correctly relative to the Launcher
BFB button (LP: #838904)
- Dash - A expand/collapse arrow is missing from all the filter category
headers (LP: #841870)
- Dash - the filter buttons should not have a mouse over state
(LP: #838901)
- Dash - the "Filter results" text is the wrong size, wrong font weight,
and aligned incorrectly in both the vertical and horizontal axis
(LP: #863240)
- Add SUPER+TAB switching mode that enables the user to switch
applications via the Launcher (LP: #891620)
- Software Centre - automatically add app icon to launcher (LP: #761851)
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- Dash - Make statefulness of Dash Home and Dash Lenses consistent
(LP: #914759)
- Unity 5.0: "All" button for filters render as "..." (LP: #91...