Inline image in text box

Text boxes are used for user documentation. It is useful to include screenshots as part of the documentation. Currently, these can be positioned manually but this does not keep correct position if the text is changed. It would be easier to maintain if the images were inline and properly both claimed the needed space in the text, and moved when the text changed.

Please consider this with my previous suggestion "Insert icon from current theme into text box". Images should be able to be inserted from the theme, or from a file. They should be able to be part of the run of the text (as icons) or set to display clear of the text (though optionally keeping images side-by-side).