visual-line-mode don't play well with org-latex-preview

[chris <inkbottle007@gmail.com>]

Hi all,

```
hello hello hello hello hello hello hello hello hello hello hello hello hello 
hello hello      \(\text {hello hello hello hello hello hello hello hello}\)
```

If you put the above text in a org file, and activate `visual-line-mode` and 
`org-latex-preview`, depending on the length of the initial part of the text, 
the generated png/svg image from latex expression can be displayed in full, 
partially hidden or totally hidden.

That certainly hinder readability.

I've search the web to see if someone else did stumbled on that but haven't 
found anything yet.

Sure enough there isn't an obvious fix that would deal with every cases, like 
when the image is longer that the width of the window of the max column of 
`visual-column-mode`. At least there are different cases to consider.

Best,
Chris