Don't depend on LibPlank

[danirabbit]

What Happened?

We currently depend on LibPlank for the PoofWindow, but (hopefully in OS 8) we'll be leaving Plank behind for a new Wayland-compatible dock

Steps to Reproduce

Try to build without LibPlank I guess 😅 Relevant code is in BookmarkRow.vala

Expected Behavior

We should either:
a. Move this PoofWindow stuff into Granite, if we intend to make this a pattern that all apps should use for removing draggable items
b. Move it into Files if this is a Files-specific thing
c. Just not have this at all

OS Version

7.x (Horus)

Software Version

Latest release (I have run all updates)

Log Output

No response

Hardware Info

No response

[jeremypw]

I think the only other thing using it is Plank itself. I think we might as well lose it from Files if it is not intended to make it a general pattern for removing sidebar items in all other apps.

[jeremypw]

I guess we can lose dragging items out of the sidebar altogether not just the animation. Code and settings plugs do not implement that.