fix: fix support image styling on index page

We didn't review the change in #1570 thoroughly enough. It caused
some issues on the splash page making the sponsor images look
enormous.

Author: skipjack

src/components/Splash/Splash.jsx

@@ -14,15 +14,15 @@ const Splash = () => (
       id="src/components/SplashViz/SplashViz.jsx"
       component={ SplashViz } />
 
-    <div className="splash__section splash__section--dark">
+    <div className="splash__section splash__section--dark page__content">
       <Container>
         <div dangerouslySetInnerHTML={{
           __html: require('page-loader!../../content/index.md').body
         }} />
       </Container>
     </div>
 
-    <div className="splash__section">
+    <div className="splash__section page__content">
       <Container>
         <h1>Support the Team</h1>
 

src/styles/markdown.scss

@@ -3,8 +3,7 @@
 @import 'functions';
 @import 'prism-theme';
 
-.page__content,
-.splash__section {
+.page__content {
   line-height:1.5em;
 
   h1 { font-size: getFontSize(4); }
@@ -240,7 +239,7 @@
     }
   }
 
-  img {
+  img:not([class*="support__"]) {
     max-width: 100%;
     height: auto;
   }