Worklog should be editable

We using Jira extensive even for project planning and progress tracking. If you accidentally mistype your work log you have no chance to correct it. The entry of a too low value could be corrected but if you enter a too high value the tracking is completely wrong.
E.g. I will enter 2d and forget the d (day) this results in 2 minutes -> correction possible with an additional worklog 1d 7h 58m
I will enter 2h and accidentally enter 2d -> correction is not possible.

(1) Is this feature covered in one of the latest releases or in the enterprise version?
(2) Is such a feature somehow planned for further release?
(3) Is it possible to add such a functionality to one of the plugin interfaces (release)?