Untile/unmaximize a window during interactive resize after receiving user input

Currently, a tiled window will be untiled when you start interactive resize. But there are clients that start interactive resize as soon as they receive a button press around their edges, e.g. Firefox, which results in unexpected untiling. Another argument is that it makes interactive resizing and interactive move consistent, they both would untile the window after explicit user input.

BUG: 470687 (cherry picked from commit 1e81fcb9)