Keybind to put floating window in tile mode (maximize window)

[ehen]

If I drag or resize a window and wants it to go back to full-size, it'd be cool to have a keybind for that.

[ehen]

From FrankenWM:

/* reset the active window from floating to tiling, if not already */
void tilemize()
{
    if (!current->isfloating)
        return;
    current->isfloating = false;
    update_current(current);
}