fix(#2057): update focused file on new terminal (#2060)

* Fixing #2057

* Update change-dir.lua

* Fixing error in force_dir_change

Author: Elias-Gill

lua/nvim-tree/actions/root/change-dir.lua

@@ -63,12 +63,12 @@ local function add_profiling_to(f)
 end
 
 M.force_dirchange = add_profiling_to(function(foldername, should_open_view)
-  if should_change_dir() then
+  local valid_dir = vim.fn.isdirectory(foldername) == 1 -- prevent problems on non existing dirs
+  if should_change_dir() and valid_dir then
     cd(M.options.global, foldername)
+    core.init(foldername)
   end
 
-  core.init(foldername)
-
   if should_open_view then
     require("nvim-tree.lib").open()
   else