when accepting, offer to place {{Db-afc-move}} when the destination is a redirect

[NovemLinguae]

Feature

• during accept, detect when the typed in new title is a redirect
• display a red message about it and offer to tag the redirect for speedy deletion
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• if no is clicked, part of the offer message disappears
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• if yes is clicked, it 1) tags the page for {{Db-afc-move}}, 2) marks the draft as under review, 3) watchlists the redirect
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  • 
• admins will need a different workflow, but let's handle that in a future patch

In addition

• fix a bug where you could still click the "accept" button even if the button was set to disabled. fixed via CSS pointer-events: 'none'. easier than removing then re-adding the click listener
• add support for generating links with the URI ?redirect=no

Notes

• didn't use addFormSubmitHandler( handleAcceptOverRedirect ) because we already did addFormSubmitHandler( handleAccept ), and it's buggy if you do it twice
• I don't check if the redirect is already tagged with {{Db-afc-move}}, because if the redirect is tagged with this at the top (normal place for CSD tags), then it won't technically be a redirect anymore and our earlier check for "does page exist and is not a redirect?" will catch this

Fixes #243