.t3js-image-manipulation-preview.media-object,
.t3js-image-manipulation-preview.media-object img.thumbnail {
  max-height: none !important;
  max-width: 300px !important;
}

.t3js-image-manipulation-preview.media-object img.thumbnail {
  width: 100%;
}

.media-gallery__list {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  margin-top: 20px;
}

.media-gallery__item {
  width: auto !important;
  flex: 0 1 auto;
}