Split floating container cannot be mod resized

[Xyene]

While testing https://github.com/swaywm/sway/issues/7209, I found that if you have a floating split (e.g. V[app app']), then the following actions work:

• resizing app and app' by the clicking and dragging border between them
• resizing the V[app app'] by floating mod resize

However, the V[app, app'] cannot be resized by clicking and dragging an outer border. This continues to be the case when app' is closed and we're left with V[app].

[markstos]

I don't have borders on my floating windows, but I confirmed that for floating windows, it still works to resize with Mod+Right Click+Drag. With this method, your target is not a narrow border, but a whole quarter of the window.