Add ability to paste a link to an external image

[b-kelly]

Requested on Meta.SE

Is your feature request related to a problem? Please describe.

Clicking the "Insert image" button opens up the following:

Which used to feature the ability to click the "paste" link to quickly paste an image or link. Here's how it looked in the older editor's tool:

And once you clicked "paste," you were greeted with a user-friendly textbox:

I take a lot of screenshots using third-party snipping tools (which auto-upload them to various image hosting sites, copying the link to my clipboard in the process), and I liked quickly uploading them using the "paste" link in the older tool, as it very quickly uploads them to Stack Exchange's imgur hosting service. Now, the only option available to me is to open a file dialog. I can paste the link directly into the "File name" portion of the open file dialog, but the ability to quickly paste a link without being taken to another window was far more streamlined.

Could you reinstate the ability to paste a link in the image insertion pane?