Blob image support

[BorjaRRR]

Would it be viable to add blob support to display images?
Ex. Excel of employees with photo

[mbleron]

Yes, it's possible.
I think I could implement the "Place-in-Cell" feature relatively easily, which will produce a result similar to using the IMAGE function but with embedded images (from BLOBs) instead of URLs.
The "Place-over-Cells" feature is a little bit complicated because it requires some DrawingML stuff, so I'll save that for later.

I should be able to work on this when I'm done with Conditional Formatting.