Easier drag to groups in block list

When dragging blocks to a group, having to hold the left button while also scrolling the list is VERY uncomfortable and very often I find out that I somehow managed to lose the dragged block(s) somewhere along the way.

It would be very useful if the block list switches to a group-only view while dragging. Since you can't reorder blocks within a group by drag-and-drop, there's no point in even having blocks visible while dragging — the groups are the only valid drop target, and having the blocks visible only makes the list to scroll through longer for no other purpose. Filtering the list to show only groups will make it much more easier to find the group you want to drop the selection into. Moreover, the list should only list the groups from the same grid as the selection, because you obviously can't drag and drop blocks from one grid to another. It can also override the collapsed state of groups and list the complete group hierarchy, even groups inside collapsed groups, so you don't waste time looking for the group you want only to discover that its parent is collapsed and you can't even see it.