[Bug] Stack trace when cutting & pasting an open buffer

[levouh]

Steps to reproduce:

• Open file tree
• Open buffer 1 from file tree
• Open buffer 2 from file tree
• Cut buffer 2 in file tree
• Paste buffer 2 in file tree to a different location
• Observe the following:

Error executing vim.schedule lua callback: ....nvim/lua/neo-tree/sources/filesystem/lib/fs_actions.lua:48: Invalid window id: 1858                                                                                                                                                                                                                                                                                                                                                           
stack traceback:                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
        [C]: in function 'nvim_win_get_buf'                                                                                                                                                                                                                                                                                                                                                                                                                                                  
        ....nvim/lua/neo-tree/sources/filesystem/lib/fs_actions.lua:48: in function 'replace_buffer_in_windows'                                                                                                                                                                                                                                                                                                                                                                              
        ....nvim/lua/neo-tree/sources/filesystem/lib/fs_actions.lua:72: in function 'rename_buffer'                                                                                                                                                                                                                                                                                                                                                                                          
        ....nvim/lua/neo-tree/sources/filesystem/lib/fs_actions.lua:167: in function <....nvim/lua/neo-tree/sources/filesystem/lib/fs_actions.lua:166>

Making an issue to track for now, but I will look at this at some point unless someone else gets there first.