title: UILaunchStoryboardName and it's value CDVLaunchScreen is being removed by ionic prepare command
body: <p>I have a Ionic Cordova project and am trying to make sure that it is fullscreen on iPhone X and newer phones. I have gone to questions like <a href="https://stackoverflow.com/questions/46232812/cordova-app-not-displaying-correctly-on-iphone-x-simulator">this one</a> and everything works fine until I run <code>ionic prepare</code> and it removes <code>&lt;key&gt;UILaunchStoryboardName&lt;/key&gt;&lt;string&gt;CDVLaunchScreen&lt;/string&gt;</code> from the .plist file. I tried adding this:</p>
  
  <pre><code>"config_munge": {
  "files": {
    "*-Info.plist": {
      "parents": {
        "UILaunchStoryboardName": [
          {
            "xml": "&lt;string&gt;CDVLaunchScreen&lt;/string&gt;",
            "count": 1
          }
        ],
  </code></pre>
  
  <p>to my ios.json and that doesn't help. I also tried this in my config.xml file:</p>
  
  <pre><code>&lt;platform name="ios"&gt;
      &lt;config-file parent="UILaunchStoryboardName" target="*-Info.plist"&gt;
          &lt;string&gt;CDVLaunchScreen&lt;/string&gt;
      &lt;/config-file&gt;
  </code></pre>
  
  <p>And that doesn't help. If I set it in both the <code>Info &gt; Custom iOS Target Properties</code> and set the <code>General &gt; App Icons and Launch Images &gt; Launch Screen File</code> to <code>CDVLaunchScreen</code> but all that always gets overwritten with the next <code>ionic prepare</code> command. How do I prevent that from being overwritten?</p>
  
  <p>P.S. my Cordova version is 8.1.2 and iOS is engine is 5.0.0. Also, if it makes a difference, here are my plugins: </p>
  
  <ul>
  <li>cordova-plugin-cocoapod-support 1.6.2 "Cordova CocoaPods Dependency Support" </li>
  <li>cordova-plugin-device 2.0.2 "Device"</li>
  <li>cordova-plugin-screen-orientation 3.0.2 "Screen Orientation"</li>
  <li>cordova-plugin-splashscreen 5.0.2 "Splashscreen"</li>
  <li>cordova-plugin-statusbar 2.4.3 "StatusBar" </li>
  <li>cordova-plugin-whitelist
  1.3.4 "Whitelist" </li>
  <li>cordova-plugin-wkwebview-engine 1.2.2-dev "Cordova WKWebView Engine" cordova-plugin-wkwebviewxhrfix 0.1.0 "WKWebView XHR Fix" </li>
  <li>cordova.plugins.diagnostic 5.0.1 "Diagnostic"</li>
  </ul>