Allow truncation of columns

[phillipdupuis]

Since columns are sized to fit the largest value, they can become extremely wide for columns of string/text data (making it very difficult to view the dataframe).

Adding an option to the 'Format' pop-up for "Truncate at [number of] characters" would be helpful. It would also be great if hovering over the truncated value or ellipsis resulted in the entire value being displayed.

I also think it would be neat if this was automatically applied to columns past a certain length, ex: if df['column_one'].map(lambda x: len(x)).max() > 50, truncate it. Since I'd guess 99% of people would not want ridiculously wide columns by default. But that isn't too important

[aschonfeld]

Fixed in https://github.com/man-group/dtale/releases/tag/v1.7.3