oh if you mean the roundedness , wow! you have an eye for detail! here ya go~

.img-thumbnail > img {
  max-width:100%;
  border-radius:.32rem
}
.img-thumbnail {
  border-radius:.52rem;
}
.gallery-row .gallery-item .gallery-edit {
  bottom:4px;
  right:4px
}
.gallery-edit > .btn {
  border-bottom-right-radius:.32rem
}
.gallery-edit .btn.btn-default.btn-sm {
  margin-top: .2rem;
}