Allow moving multiple selected elements in Canvas layout mode

Description:

In the Canvas layout, it is currently possible to move individual images or the entire layout, but not multiple selected elements at once.

This often limits the full potential of the Canvas layout mode. For example, if I need to create space in the middle of a longer and possibly complex layout, I cannot shift a group of elements (e.g. all items on one side) together. Instead, I have to move each element individually to make space for the image I want to insert. This can result in having to partially dismantle and rebuild the layout. Since this mode enables highly customized and intricate designs, this may require undoing work that took significant time and effort to create.

Suggested solution:

Allow selecting multiple assets (e.g. via the Assets panel) and moving them as a group, similar to layer selection in design tools like Photoshop.

Benefit:

This would make editing layouts in Canvas mode much faster and more efficient, both for simple arrangements (e.g. inserting an image into a row of elements) and for more complex compositions. It would also better support the intuitive creative potential of the Canvas workflow by preserving carefully arranged layouts and avoiding unnecessary rework. This improvement would benefit both horizontal and vertical use cases.