Subject of the issue
Incorrect calculation of block height when using "sizeToContent: true" and an image in an inner block without text.
Your environment
- version of gridstack.js - 11.1.2 & 11.2.0 & 11.4.0
- which Chrome, Chromium/Windows 8.1, 10
Steps to reproduce
https://jsfiddle.net/b50v4t87/
Expected behavior
The outer border of the block must match the size of the image regardless of "cellHeight"

