Fix fullwidth media CSS bugs with NSFW video, and bad spoiler margin on static pages (#60)

* Fix fullwidth style not applied to NSFW video correctly

* Fix botched video .media-spoiler margin on static pages

app/javascript/mastodon/components/video_player.js

@@ -138,7 +138,7 @@ export default class VideoPlayer extends React.PureComponent {
     if (!this.state.visible) {
       if (sensitive) {
         return (
-          <div role='button' tabIndex='0' style={{ height: `${height}px` }} className='media-spoiler' onClick={this.handleVisibility}>
+          <div role='button' tabIndex='0' style={{ height: `${height}px` }} className={`media-spoiler ${fullwidth ? 'full-width' : ''}`} onClick={this.handleVisibility}>
             {spoilerButton}
             <span className='media-spoiler__warning'><FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' /></span>
             <span className='media-spoiler__trigger'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
@@ -146,7 +146,7 @@ export default class VideoPlayer extends React.PureComponent {
         );
       } else {
         return (
-          <div role='button' tabIndex='0' style={{ height: `${height}px` }} className='media-spoiler' onClick={this.handleVisibility}>
+          <div role='button' tabIndex='0' style={{ height: `${height}px` }} className={`media-spoiler ${fullwidth ? 'full-width' : ''}`} onClick={this.handleVisibility}>
             {spoilerButton}
             <span className='media-spoiler__warning'><FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' /></span>
             <span className='media-spoiler__trigger'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>

app/javascript/styles/components.scss

@@ -2319,9 +2319,13 @@ button.icon-button.active i.fa-retweet {
   text-align: center;
   z-index: 100;
 
-  margin-top: 15px; // Add margin when used bare for NSFW video player
-  .media-gallery & {
-    margin-top: 0;
+  .status__content > & {
+    margin-top: 15px; // Add margin when used bare for NSFW video player
+  }
+
+  &.full-width {
+    margin-left: -68px;
+    width: calc(100% + 80px);
   }
 }