More than four months after announcing Apple’s acquisition of Pixelmator, the deal appears to have been completed without any announcement, since users of the Pixelmator apps are displaying new splash screen announcing the deal. The messages on the splash screen is a simple “We are excited to announce that Pixelmator Pro is now part of Apple,” and Pixelmator users confirmed that they are getting the similar message using app. So both Pixelmator Pro and Photomator…