Updated Qt Creator application logos

The leaf does not have a white border, anymore. The .ico and
.icns files now have a shadow.

Task-number: QTCREATORBUG-13359
Change-Id: Iebdc6aefb36592333f1d76cd28a407a121318bb6
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/coreplugin/mainwindow.cpp

@@ -154,7 +154,7 @@ MainWindow::MainWindow() :
     Utils::HistoryCompleter::setSettings(PluginManager::settings());
 
     setWindowTitle(tr("Qt Creator"));
-    if (!Utils::HostOsInfo::isMacHost())
+    if (Utils::HostOsInfo::isLinuxHost())
         QApplication::setWindowIcon(QIcon(QLatin1String(Constants::ICON_QTLOGO_128)));
     QCoreApplication::setApplicationName(QLatin1String("QtCreator"));
     QCoreApplication::setApplicationVersion(QLatin1String(Core::Constants::IDE_VERSION_LONG));

src/plugins/coreplugin/versiondialog.cpp

@@ -33,6 +33,7 @@
 #include <app/app_version.h>
 #include <coreplugin/coreconstants.h>
 #include <coreplugin/icore.h>
+#include <utils/hostosinfo.h>
 #include <utils/qtcassert.h>
 
 #include <QDialogButtonBox>
@@ -49,6 +50,7 @@ VersionDialog::VersionDialog(QWidget *parent)
 {
     // We need to set the window icon explicitly here since for some reason the
     // application icon isn't used when the size of the dialog is fixed (at least not on X11/GNOME)
+    if (Utils::HostOsInfo::isLinuxHost())
         setWindowIcon(QIcon(QLatin1String(Constants::ICON_QTLOGO_128)));
 
     setWindowTitle(tr("About Qt Creator"));