Add context menu to make edit operations

[gitgkk]

Is your feature request related to a problem? Please describe.
When editing tasks using a toolbar is implemented, it is painful to keep moving the mouse at the top and then coming back to where the task is. Working efficiency is lost.

Describe the solution you'd like
I'd like to have a context menu on each task in the row. It should have an option to add, delete, cut, copy, paste, indent, outdent, expand, collapse task.

Describe alternatives you've considered
Toolbar at the top. This is inefficient.

Additional context

Any help guidance on how to implement this will also be appreciated.