message: Add linear gradient to images in bubble layout
diff: @@ -188,6 +188,24 @@ limitations under the License.
  z-index: 3; // above media and location share maps
  }
  + &.mx_EventTile_mediaLine {
  + .mx_MessageTimestamp {
  + color: #ffffff; // regardless of theme, always visible on the below gradient
  + }
  +
  + // linear gradient to make the timestamp more visible
  + .mx_MImageBody::before {
  + content: "";
  + position: absolute;
  + background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.2) 100%);
  + z-index: 1;
  + top: 0;
  + bottom: 0;
  + left: 0;
  + right: 0;
  + }
  + }
  +
  //noinspection CssReplaceWithShorthandSafely
  .mx_MImageBody .mx_MImageBody_thumbnail {
  // Note: This is intentionally not compressed because the browser gets confused
  