[5.8 pre staging] launcher is displayed on the left screen, not the primary one

Bug Description

Using r2142 the launcher is displayed on the left screen, not the primary one, the dash is displayed on the right screen though

Trevinho: You might also need this fix: https://code.launchpad.net/~vanvugt/unity/fix-742544-alt-trunk/+merge/86779

Trevinho's fix doesn't seem to work on nvidia here.

didrocks, no I expect you would need one of my fixes for detecting the correct primary monitor:
https://code.launchpad.net/~vanvugt/unity/fix-742544-alt-trunk/+merge/86779
https://code.launchpad.net/~vanvugt/unity/fix-742544-trunk/+merge/79492

Though I haven't checked if those now contain conflicts. They're 5 months old.

Yes Daniel, I knew about your branches, but I've not Nvidia hardware here to test (only one working with xrandr)...
Please, refresh and test again your branches for that ;)

This bug was fixed in the package unity - 5.8.0-0ubuntu1

---------------
unity (5.8.0-0ubuntu1) precise-proposed; urgency=low

* New upstream release.
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unity::indicator::DBusIndicators::Impl::RequestSyncAll() (LP: #864737)
- Pressing "Alt+Enter" causes compiz to crash in CompOption::value() from
unity::UnityScreen::showLauncherKeyTerminate (LP: #960957)
- SEGSIGV after unplugging external monitor (LP: #962693)
- Background colorization should use a different heuristic (LP: #865239)
- compiz+unity3d generates > 50 wakeups a second on idle system
(LP: #917210)
- [FFe, UIFe] HUD - The HUD does not respect launcher autohide or icon
size settings (LP: #921506)
- clicking on folders in the file lens does not open nautilus
(LP: #921665)
- No text inside multirange filters (LP: #927710)
- can't alt-tab restore minimized uis which have an instance on another
workspace (LP: #933397)
- Ubuntu Software Center Unity launcher integration is not working
(LP: #932280)
- The line separator between the launcher and the dash is cleared when
selecting a category (LP: #941082)
- unity-panel-service crashed with SIGSEGV in g_hash_table_foreach()
(LP: #937119)
- Alt-F10 locks up Unity (LP: #948522)
- multimonitor, launcher: Provide an option to display either a single
launcher or a launcher on each display in a multi-monitor environment
(LP: #950136)
- multimonitor: Please give me a way to turn off sticky monitor edges
(LP: #946104)
- Unity 5.6: key bindings (such as Super) don't work on empty workspace or
on slow/loaded systems (LP: #953089)
- Alt+arrows keyboard shortcuts don't invoke Back and Forward navigation
(LP: #953783)
- HUD is sending 2 menu signals instead of 1 (LP: #956878)
- 6th item of HUD not fully visible (LP: #957229)
- HUD: seems to trigger operations more than once (LP: #960503)
- Launcher gets always desaturated when using HUD on secondary monitor
(LP: #961169)
- [5.8 pre staging] launcher is displayed on the left screen, not the
primary one (LP: #961281)
- launcher icons do not re-saturate after dash is closed (LP: #961844)
- Launcher shows arrows for applications on all workspaces (LP: #961977)
- Dash - Implement overlay scrollbars in Dash (LP: #608124)
- [UIFe] Dash - No message displayed when no results are returned in the
Dash (LP: #711199)
- Dash - "See more..." line should be base-aligned with section header
(LP: #748101)
- Dash - Missing category separator line in dash (LP: #850984)
- Dash and Launcher - As soon as a user starts dragging a file from the
Dash, there is a 'flicker' before the Launcher icons that are valid drop
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- Dash - When multiple results have equal string match relevancy ranking,
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- Keyboard shortcut - F10 shortcut is used to show m...