adjust the width of column by mouse; qucik copy in a data

1. when write the java log, the log message in the last is thin, it is not a apporiate width

No file, test, or entry point is named. Start by reproducing the narrow final column with the Java log message in the data view, then trace the relevant column-sizing and copy interactions. Done means the final column has an appropriate width and the requested quick-copy behavior is confirmed, though the issue does not define that behavior clearly.

Written by the indexing model from the issue text.