Is there a way to convert ITEM to Group to Board

Is there a way (manually or automatically) to convert the following:
An Item to a group
An Item to a board
A group to a board

The use case:
An activity in a project (item/pulse) needs to be further expanded on with subtasks (instead of using the subtask workaround from the chat/activity area). If I can just press a status button to convert this activity into a subproject (group) or a new project (board).

Not to convert. But you can Move Items and Groups easily.

An Item to a group
An Item to a board

Select one or more items by ticking the checkbox next to it then Move it via the toolbar at the bottom.

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A group to a board

Use the small arrow to the left of the Group then select Move from the menu.

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