This snippet will make table rows wrap in edit mode.
pre.HyperMD-table-2.HyperMD-table-row.HyperMD-table-row-1.CodeMirror-line {
white-space: pre-wrap;
}
This has to be done for each row. For convenience, I’ve created a paste with it done for the first hundred rows.
Update: I have a report that this doesn’t work for someone.
Update_2: I tested it in a fresh vault with no community plugins enabled and no custom CSS. It worked.