fix issue with folder names like "a, b"

"a, b" (without the quotes) is a valid Windows folder name, but when using Open in -> System Explorer the folder is not shown in the System explorer but the "My Computer" View

Author: astrograph

bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEPreferenceInitializer.java

@@ -111,7 +111,7 @@ public static String getShowInSystemExplorerCommand() {
 		if (Util.isGtk()) {
 			return "dbus-send --print-reply --dest=org.freedesktop.FileManager1 /org/freedesktop/FileManager1 org.freedesktop.FileManager1.ShowItems array:string:\"${selected_resource_uri}\" string:\"\""; //$NON-NLS-1$
 		} else if (Util.isWindows()) {
-			return "explorer /E,/select=${selected_resource_loc}"; //$NON-NLS-1$
+			return "explorer /E,/select=\"${selected_resource_loc}\""; //$NON-NLS-1$
 		} else if (Util.isMac()) {
 			return "open -R \"${selected_resource_loc}\""; //$NON-NLS-1$
 		}