Bulk-select angels for confirmation of angel types

[esenneddy]

As an angel type supporter, I want to bulk-select pending angel requests to confirm them after having attended angel type introductions (checkbox mark pending requests and click „commit“ once).

[jplitza]

IMO the best/easiest/fastest option to go about this is to make the buttons for confirmation or rejection (optionally) work with AJAX. That would cause 0 optical changes, but clicking the button wouldn't navigate away from the page at all.

Since for some reason the confirmation of an angel type is guarded by a confirmation dialog, the button that was pressed could be replaced by an Undo button afterwards.

On the server side, the current (legacy) controller already supports confirmation or deletion of a single entry. It just doesn't respond with JSON, but with HTML…

[MyIgel]

For using js backend requests we will need the API which is currently in progress (and extend it to that use case)