[QML PFD]: Fixes an issue by which the PFD was continuing to process
events even when it was no longer visible. This specifically sets the
processed states to 0 as long as the PFD is not visible, and sets them to
the corresponding UAVO when they are.

On OSX with Qt 4.8, this saved 14% processor load.
Merge pull request #918 from kubark42/fix-qml-cpu-usage

Fixes an issue by which the PFD was continuing to process events even when it was no longer visible.
Revert "Merge pull request #873 from kubark42/fix-sysalarmmessaging-dependency"

This reverts commit 3fb0f748acc64dd99cb9352636b49d68fae3d4da, reversing
changes made to 4b5a76c790c7c9d7a0797abd15ec378b6338d670.
Merge pull request #936 from peabody124/windows_build_fix

Revert "Merge pull request #873 from kubark42/fix-sysalarmmessaging-depe...