The main issue...
- When adding a table, each cell gets a certain width (one cell per row
99.4886%, two cells per row 49.5467% etc., and the table itself 100%). In the old version of the editor, the width of each cell (and the table itself) was automatically adjusted to the length of the text it contained. This is a *major* problem, as the property of each cell in each row needs to be changed manually.
...keeps unresolved. So probably someone can give an answer to this:
Roundcube has a github that the developers are active on where you can report issues or suggest your own pull request. Maybe the cancel button and was just an oversight and not a deliberate choice to remove. Submit an issue and the devs might add it in the next release or at least tell you why it's gone. Same for the table width issue.
https://github.com/roundcube/roundcubemail/