none-editable markdown cell can be 'unrendered'

When setting a markdown cell's metadata to 'editable:false', clicking in the cell 'unrenders' the html to markdown. Re-rendering needs to be done by executing the cell. On the one hand, intuitively, an uneditable markdown cell should not have this behaviour. On the other hand, being able to copy the markdown content may be desirable.

Is the current behaviour intentional or a bug? If intentional, would it be possible to have a metadata setting disabling seeing markdown for an uneditable markdown cell?

Start by reproducing the behavior with a markdown cell whose metadata sets editable:false, then click the cell and observe whether it un renders to markdown. Review the existing discussion about intentional behavior and determine whether the desired outcome is preserving the rendered HTML or adding a metadata setting to prevent showing markdown.

Written by the indexing model from the issue text.