Implement the ability to select multiple tasks in the Graph and Tree views

[alekzander9]

Description

The possibility to select multiple tasks (by a long click) in the Graph (and/or Tree) views in order to apply an action to all of them with the pop-up dialog (for example clear or mark as success).

Use case / motivation

Sometimes it is convenient to have the ability to apply an action to a subset of tasks in a DAG that don't have anything in common. For example if you have three similar branches (one branch per external provider for example) with 10 tasks each in a DAG, you might want to clear the same task in each branch. At the moment this is quite slow since we need to click many times and the UI is refreshed each time.

Related Issues

Couldn't find any

[boring-cyborg]

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[alekzander9]

If you're interested by this feature I'm willing to work on it