source=* tag for changeset

[polarbearing]

It would be helpful to have, beside the field for the changeset comment, a form field for the changeset source=* tag.

There was a fix provided for #7 and #12, but I cannot see where a source tag is added in the code?

[Zverik]

Write at the top of text area:

changeset
source=whatever

And it will set the changeset tag source to whatever.

[polarbearing]

Understood. I propose to document this feature, please review.

[Zverik]

Looks good, thank you!