fix: open on tabpage when tree is already open only

lua/nvim-tree.lua

@@ -39,7 +39,7 @@ function M.open()
 end
 
 function M.tab_change()
-  if not view.win_open() then
+  if not view.win_open() and view.win_open({ any_tabpage = true }) then
     view.open()
   end
 end

lua/nvim-tree/view.lua

@@ -163,9 +163,18 @@ function M._prevent_buffer_override()
   end)
 end
 
-function M.win_open()
+function M.win_open(opts)
+  if opts and opts.any_tabpage then
+    for _, v in pairs(M.View.tabpages) do
+      if  a.nvim_win_is_valid(v) then
+        return true
+      end
+    end
+    return false
+  else
     return M.get_winnr() ~= nil and a.nvim_win_is_valid(M.get_winnr())
   end
+end
 
 function M.set_cursor(opts)
   if M.win_open() then