Media modal: make the "Selected" row (at the bottom) thumbnails non-draggable

[azaozz]

Continuing from https://core.trac.wordpress.org/ticket/29606#comment:15, the small thumbnails that show in the "Selected" row at the bottom while selecting images for a gallery are currently draggable. This doesn't seem particularly usable as they are draggable only while selecting images for a new gallery and only the first few are shown (depending on the window width).

[ericlewis]

Dig.

[jessepollak]

29934.patch

[jessepollak]

Multiple images selected in original order

[jessepollak]

Multiple images selected in rearranged order

[jessepollak]

Dug into this one and I've attached a patch that makes the "Selected" row at the bottom non-draggable.

That said, this restricts functionality for the use case where I want to insert multiple images into a post in a certain order. Without the patch I can (see screenshots above):

1. Select the multiple images I want to insert.
2. Drag the Selected images at the bottom to the order I want to insert in.

With the patch, I can't do step (2), so I'll need to reorder the images after I insert them (which is OK, but not great).

Thoughts on how we'd like to proceed?

[johnbillion]

In 30686:

Remove the sortable functionality from the selection editing toolbar at the bottom of the media manager.

Fixes #29934
See #24352
Props jessepollak