Comment 26 for bug 1351024

I rigged further, and seems we have a problem with Qt defining the singletons, or there is something in our backend which makes the PickerPanel singleton to be instantiable.
There was a change in UITK which brought the proper instantiation of QML singletons. This affected UbuntuColors and PickerPanel. UbuntuColors works well (you can see every app using it, components using it) but fro some reason when PickerPanel is about to be used, it said cannot find it. See logs below:

libust[21858/21860]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[21858/21860]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[21858/21861]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[21858/21861]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:886)

(process:21858): dconf-CRITICAL **: unable to create file '/run/user/32011/dconf/user': Permission denied. dconf will not work properly.

(process:21858): dconf-CRITICAL **: unable to create file '/run/user/32011/dconf/user': Permission denied. dconf will not work properly.

(process:21858): dconf-CRITICAL **: unable to create file '/run/user/32011/dconf/user': Permission denied. dconf will not work properly.
<Unknown File>: Invalid empty URL
UbuntuWindow - regular geometry
UbuntuWindow::handleSurfaceFocusChange(focused=true)
UbuntuWindow::handleSurfaceResize(width=768, height=1226)
QQmlComponent: Created graphical object was not placed in the graphics scene.
QQmlComponent: Created graphical object was not placed in the graphics scene.
QQmlComponent: Created graphical object was not placed in the graphics scene.
virtual QtOrganizer::QOrganizerCollection QOrganizerEDSEngine::defaultCollection(QtOrganizer::QOrganizerManager::Error*) Not implemented
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined
file:///usr/share/click/preinstalled/com.ubuntu.calendar/0.4.441/NewEvent.qml:238: ReferenceError: PickerPanel is not defined