415900 - extend the existing undo-redo handler

Status: VERIFIED DUPLICATE of bug 398405

(Calendar :: Calendar Frontend, defect)

Description

[Berend Cornelius]

With the patch of bug 413474 being applied there may turn up a problem when the user wants to delete a message from the mail view with the focus being on the agenda-pane or task pane. Pressing the delete toolbar button will then remove an element of the focused pane which the user may not be aware of. Unfortunately we do not provide an own undo action controller for the mail-mode, so there is no way to undo this action (in mail-mode!). Having discussed over this problem with mickey we suggest the following solution:
We provide an own undo-redo-stack for each mode and will separate these stacks from one another. To make this clear to the user we would have to deliver a description in the according undo/redo menuitem like "undo Delete Event" ....
Deleting an event/task in mail-mode would then add an action to the undo-redo stack of thunderbird.