[Glitch] Fix uncached media in web UI not being clickable

Port acf168f1a2 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/components/media_gallery.js

@@ -179,7 +179,7 @@ class Item extends React.PureComponent {
     if (attachment.get('type') === 'unknown') {
       return (
         <div className={classNames('media-gallery__item', { standalone })} key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
-          <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url')} target='_blank' style={{ cursor: 'pointer' }} title={attachment.get('description')}>
+          <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url') || attachment.get('url')} target='_blank' style={{ cursor: 'pointer' }} title={attachment.get('description')}>
             <canvas width={32} height={32} ref={this.setCanvasRef} className='media-gallery__preview' />
           </a>
         </div>
@@ -372,7 +372,7 @@ export default class MediaGallery extends React.PureComponent {
 
     return (
       <div className={computedClass} style={style} ref={this.handleRef}>
-        <div className={classNames('spoiler-button', { 'spoiler-button--minified': visible && !uncached })}>
+        <div className={classNames('spoiler-button', { 'spoiler-button--minified': visible && !uncached, 'spoiler-button--click-thru': uncached })}>
           {spoilerButton}
           {visible && sensitive && (
             <span className='sensitive-marker'>

app/javascript/flavours/glitch/styles/components/index.scss

@@ -1239,6 +1239,10 @@
     align-items: center;
   }
 
+  &--click-thru {
+    pointer-events: none;
+  }
+
   &--hidden {
     display: none;
   }
@@ -1269,8 +1273,6 @@
     }
 
     &:disabled {
-      cursor: not-allowed;
-
       .spoiler-button__overlay__label {
         background: rgba($base-overlay-background, 0.5);
       }