Updated Turkish translation
panelMenu: Clean up code a bit
main: Move pref overrides back into C

Commit 6c2f3d1d178a65d moved pref overrides into JS to implement
session mode specific overrides in a clean and generic way.
However that approach comes with a cost - doing the overrides only
after having handled over control to JS means that the core will
be initialized with the non-overridden settings before changing
to the correct values. In the best case this is unnecessary work,
but it can in fact have a worse effect: when initializing workspaces,
we will restore the previous number of workspaces when using
dynamic-workspaces and reset to the configured number otherwise.
As the non-overridden default for dynamic-workspaces is FALSE, we
can easily end up moving the user's windows to the "wrong" workspace.

Now GSettings is expected to grow support for session specific defaults,
which will render our entire override system obsolete (yay!). Given
that, it seems acceptable to use a less generic (and uglier) approach
in the meanwhile, in order to fix aforementioned problems. So move
overrides back before core initialization and just hardcode the
session-mode => override-schema relation.

https://bugzilla.gnome.org/show_bug.cgi?id=695487
sessionMode: Don't set overridesSchema

Unused since commit ae2751a68b20a.
data: Do not convert 'button-layout' setting

It has been removed from our overrides schema ...
main: Actually use the correct schema for overrides

Fix commit ae2751a68b20ab to not only pick up the keys from the
correct schema, but also use the correct schema-id for the overrides.
viewSelector: Use clutter constant instead of true
Prototype IconGrid animations
appDisplay: Reset to page 0 on exiting AllView

Currently is only set to 0 when hidding overview.
But we can also exit AllView clicking the showApps
dash icon or other ways.
That causes inconsistency and AllView thinks the
current page is different than 0 when opened again.

Now that we always call animate() to open and exit
AllView we can rely on that to reset the currentPage
perf: Show apps perf