fix(#2879): remove unnecessary tree window width setting to prevent unnecessary :wincmd = (#2881)

Author: alex-courtis

Diff for: lua/nvim-tree/view.lua

@@ -346,14 +346,18 @@ function M.resize(size)
     return
   end
 
-  local new_size = get_width()
-  vim.api.nvim_win_set_width(M.get_winnr() or 0, new_size)
+  local winnr = M.get_winnr() or 0
 
-  events._dispatch_on_tree_resize(new_size)
+  local new_size = get_width()
 
-  if not M.View.preserve_window_proportions then
-    vim.cmd ":wincmd ="
+  if new_size ~= vim.api.nvim_win_get_width(winnr) then
+    vim.api.nvim_win_set_width(winnr, new_size)
+    if not M.View.preserve_window_proportions then
+      vim.cmd ":wincmd ="
+    end
   end
+
+  events._dispatch_on_tree_resize(new_size)
 end
 
 function M.reposition_window()