abort iteration when fs-event-incapable

Fixes nvim-tree#2866. The original code, while detecting whether Windows NT
allows the dir to be iterated through, will go to the other branch
of the if...else... statement, which is intended for cases when
filter_reason is not none. Simply moving `is_fs_event_capable` into the
first branch should solve the problem.

Author: Shaobin-Jiang

lua/nvim-tree/explorer/explore.lua

@@ -40,22 +40,24 @@ local function populate_children(handle, cwd, node, git_status, parent)
     ---@type uv.fs_stat.result|nil
     local stat = vim.loop.fs_stat(abs)
     local filter_reason = parent.filters:should_filter_as_reason(abs, stat, filter_status)
-    if filter_reason == FILTER_REASON.none and not nodes_by_path[abs] and Watcher.is_fs_event_capable(abs) then
-      local child = nil
-      if t == "directory" and vim.loop.fs_access(abs, "R") then
-        child = builders.folder(node, abs, name, stat)
-      elseif t == "file" then
-        child = builders.file(node, abs, name, stat)
-      elseif t == "link" then
-        local link = builders.link(node, abs, name, stat)
-        if link.link_to ~= nil then
-          child = link
+    if filter_reason == FILTER_REASON.none and not nodes_by_path[abs] then
+      if Watcher.is_fs_event_capable(abs) then
+        local child = nil
+        if t == "directory" and vim.loop.fs_access(abs, "R") then
+          child = builders.folder(node, abs, name, stat)
+        elseif t == "file" then
+          child = builders.file(node, abs, name, stat)
+        elseif t == "link" then
+          local link = builders.link(node, abs, name, stat)
+          if link.link_to ~= nil then
+            child = link
+          end
+        end
+        if child then
+          table.insert(node.nodes, child)
+          nodes_by_path[child.absolute_path] = true
+          explorer_node.update_git_status(child, node_ignored, git_status)
         end
-      end
-      if child then
-        table.insert(node.nodes, child)
-        nodes_by_path[child.absolute_path] = true
-        explorer_node.update_git_status(child, node_ignored, git_status)
       end
     else
       for reason, value in pairs(FILTER_REASON) do