Tasks V1/V2 compatibility

[zonia3000]

Checklist before merging

• I added an appropriate entry to CHANGELOG.md

Closes #438
Closes #433
Closes #448
Closes #330

[zonia3000]

The new Task V1/V2 compatibility page:

Switcher for V1/V2 tasks in workflow page task selector:

Legacy tasks inserted in V2 workflow:

[tcompa]

The new Task V1/V2 compatibility page:

Looks good to me!
How are we displaying different versions of the same task? Are they still all listed (even if they are not grouped any more)?

Switcher for V1/V2 tasks in workflow page task selector:

I think we should avoid V1 and V2. Maybe "current tasks" and "legacy tasks"?

Legacy tasks inserted in V2 workflow:

Same as above, what about "legacy" instead of "v1"?

[zonia3000]

With multiple versions the old versions are inside collapsed rows, as in the main task list table:

Used current/legacy:

[jluethi]

+1 on using legacy wording.

I think Tommaso's question was for the adding task modal. There, the version selector usually just shows up when a task is selected, I assume it's still the same :)

[tcompa]

Task V1 collection:

Task V2 collection:

Admin V2 sections:

Setting V1 tasks as V2-compatible (with single versions):

Setting V1 tasks as V2-compatible (with multiple versions available):

Minor question: before I expand the "+" button, I can already mark act on the true/false switch, which modifies the latest-version task. I'm not sure this is the most intuitive behavior (at first I thought it would have modified the whole block of tasks, for all versions), but TBH this is an admin-only page and we don't need to invest in polishing too much.

Adding a V2 task into a V2 workflow

Adding a V1 task into a V2 workflow (when no V1 task is V2-compatible):

Adding a V1 task into a V2 workflow (when there is a single version of the only V2-compatible V1 task):

Adding a V1 task into a V2 workflow (when there are two versions of the only V2-compatible V1 task):

[tcompa]

All works as expected, thanks!
Let's open other issues for polishing this new feature.

[jluethi]

Minor question: before I expand the "+" button, I can already mark act on the true/false switch, which modifies the latest-version task. I'm not sure this is the most intuitive behavior (at first I thought it would have modified the whole block of tasks, for all versions), but TBH this is an admin-only page and we don't need to invest in polishing too much.

I'd encourage only making the most recent version V2 compatible, to avoid supporting too many V1 tasks.

Looks good to me overall!