Removed references to Lumberyard (#1645)

Signed-off-by: Terry Michaels <miterenc@amazon.com>

Code/Sandbox/Editor/EditorViewportWidget.cpp

@@ -2839,7 +2839,7 @@ void EditorViewportWidget::RestoreViewportAfterGameMode()
     if (restoreOnExitGameModePopupDisabledRegValue.isNull())
     {
         // No, ask them now
-        QMessageBox messageBox(QMessageBox::Question, "Lumberyard", text, QMessageBox::StandardButtons(QMessageBox::No | QMessageBox::Yes), this);
+        QMessageBox messageBox(QMessageBox::Question, "O3DE", text, QMessageBox::StandardButtons(QMessageBox::No | QMessageBox::Yes), this);
         messageBox.setDefaultButton(QMessageBox::Yes);
 
         QCheckBox* checkBox = new QCheckBox(QStringLiteral("Do not show this message again"));

Code/Sandbox/Editor/RenderViewport.cpp

@@ -4094,7 +4094,7 @@ void CRenderViewport::RestoreViewportAfterGameMode()
     if (restoreOnExitGameModePopupDisabledRegValue.isNull())
     {
         // No, ask them now
-        QMessageBox messageBox(QMessageBox::Question, "Lumberyard", text, QMessageBox::StandardButtons(QMessageBox::No | QMessageBox::Yes), this);
+        QMessageBox messageBox(QMessageBox::Question, "O3DE", text, QMessageBox::StandardButtons(QMessageBox::No | QMessageBox::Yes), this);
         messageBox.setDefaultButton(QMessageBox::Yes);
 
         QCheckBox* checkBox = new QCheckBox(QStringLiteral("Do not show this message again"));

Code/Sandbox/Plugins/FFMPEGPlugin/FFMPEGPlugin.cpp

@@ -76,7 +76,7 @@ QString CFFMPEGPlugin::GetFFMPEGExectablePath()
     // see what can be found!
     QString ffmpegExectablePath;
 
-    QSettings settings("Amazon", "Lumberyard");
+    QSettings settings("O3DE", "O3DE");
     settings.beginGroup("Settings");
     ffmpegExectablePath = settings.value("FFMPEG_PLUGIN").toString();