✅ Avalonia override SimpleTheme resources

<Styles x:Class="igneous.avalonia.theme.IgneousTheme"
        xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:controls="using:igneous.avalonia.controls">

  <Styles.Resources>
    <ResourceDictionary>      
      <ResourceDictionary.MergedDictionaries>

        <SimpleTheme />

        <ResourceDictionary>
          <ResourceDictionary.ThemeDictionaries>
            <ResourceDictionary x:Key="Dark">
              <Color x:Key="ThemeBackgroundColor">#FFF00FFF</Color>
              <Color x:Key="ThemeBorderLowColor">#FFF00FFF</Color>
              <Color x:Key="ThemeBorderMidColor">#FFF00FFF</Color>
              <Color x:Key="ThemeBorderHighColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlLowColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlMidColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlMidHighColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlHighColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlVeryHighColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlHighlightLowColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlHighlightMidColor">#FFF00FFF</Color>
              <Color x:Key="ThemeControlHighlightHighColor">#FFF00FFF</Color>
              <Color x:Key="ThemeForegroundColor">#FFF00FFF</Color>
              <Color x:Key="HighlightColor">#FFF00FFF</Color>
              <Color x:Key="HighlightColor2">#FFF00FFF</Color>
              <Color x:Key="HyperlinkVisitedColor">#FFF00FFF</Color>
            </ResourceDictionary>
          </ResourceDictionary.ThemeDictionaries>
        </ResourceDictionary>

      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Styles.Resources>

</Styles>