Graphicsview: Simplify code

order is either Ascending or Descending (0 or 1), so this comparison is
unnecessary.

Change-Id: Ieceacf18f1bf3c7a7555205a140b738daa92bd04
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Revert Mac event loop changes.

"Make QGuiApplication::exec() run within NSApplicationMain()"
"Make Qt process native and timer events on Cocoa applications"
"Cocoa: Fix QFontDialog, QColorDialog auto-tests"

This reverts commits
1e14762b8d79118540bd09a84dd3e48f4f5e113e
e4b2a0b4bab2a17a65fedafe9bae50af1fe019f6
df7944e7d7dd8b2bbccbd639eff0ab09745d6cc3

Change-Id: I80b65b5ee0297b090f807bd420664233dfc44f7b
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
QDbus: Fix (!a == b) comparison

! binds to a, and that is wrong here.

Change-Id: I746d2b82bbd03635b3aa06abb0c5566f84a03128
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>