Allow easier mass movement of sprites to texture groups

[darkshredder11]

Is your feature request related to a problem?

It's quite a pain to reorganize sprites into appropriate texture groups since you need to manually open the dropdown for texture setting and then open the dropdown of texture groups for each sprite imported.

Describe the solution you'd like

Simply allow groups of sprite assets to be dragged into the appropriate texture group via the texture group manager all at once, like how you can drag objects directly into the children list in the object parents window.

(The above cannot be done right now, no matter which part of the window you drag it to)

Describe alternatives you've considered

This could also be resolved by allowing multiple assets to be selected at once in the Add Assets sub-window of the texture group manager, which it also doesn't allow (It closes immediately after selected a single asset, and I tried context modifying keys such as CTRL and Shift, as well as clicking and dragging to see if it would allow multi-select, but it doesn't).

Making it work more like a multi-checklist could be nice, as having it close after only a single selection requires navigating all the way back through your folder structure to select another, which actively disincentivizes keeping assets organized. This point also goes for the button to add children to objects, but it is less of an issue because it supports dragging the object assets directly onto it, as mentioned.

Additional context

No response

[attic-stuff]

the inspector is the tool for doing batch actions; you can cherry pick or multi-select many sprites and change their texture group, origin, etc, all at the same time right in the inspector

[stuckie]

Closing as above.