Feature Request: Add Backgound image to Comment

[piepiax]

Hi,
First of all, congrats for this wonderful package, very useful and almost complete.

I wrote a new issue / Feature request but it could be probably merged with the #188 as it's about add a background image to comments.

Indeed, I use a comment to insert image associated to a particular feature/value within a cell.
This is particularly useful to have a rapid visual insight when you mouse hover the cell
For the moment, I have to use a Macro (.xlsm) to edit this kind of comment and it would easier to have it directly when I create the .xlsx without any action by the user

Here an example what I talk about Picture in Comment Example

Thanks

[jmcnamara]

Similar to a request in XlsxWriter: jmcnamara/XlsxWriter#377

[jmcnamara]

Closed as a duplicate of jmcnamara/XlsxWriter#377 They will both be closed at the same time (if they are closed).