Fix dirmonitor sorting issues (#1599)

* Use `PATHSEP` in path-related functions

* Don't stop on digits when getting the common part in `system.path_compare`

* Avoid sorting multiple times in `dirwatch.get_directory_files`

This also fixes the timeout detection in `recurse_pred`.

data/core/init.lua

@@ -102,7 +102,7 @@ local function strip_leading_path(filename)
 end
 
 local function strip_trailing_slash(filename)
-  if filename:match("[^:][/\\]$") then
+  if filename:match("[^:]["..PATHSEP.."]$") then
     return filename:sub(1, -2)
   end
   return filename
@@ -120,9 +120,7 @@ local function show_max_files_warning(dir)
     "Too many files in project directory: stopped reading at "..
     config.max_project_files.." files. For more information see "..
     "usage.md at https://github.com/lite-xl/lite-xl."
-  if core.status_view then
-    core.status_view:show_message("!", style.accent, message)
-  end
+  core.warn(message)
 end
 
 
@@ -184,7 +182,7 @@ local function refresh_directory(topdir, target)
     directory_start_idx = directory_start_idx + 1
   end
 
-  local files = dirwatch.get_directory_files(topdir, topdir.name, (target or ""), {}, 0, function() return false end)
+  local files = dirwatch.get_directory_files(topdir, topdir.name, (target or ""), 0, function() return false end)
   local change = false
 
   -- If this file doesn't exist, we should be calling this on our parent directory, assume we'll do that.
@@ -265,7 +263,7 @@ function core.add_project_directory(path)
 
   local fstype = PLATFORM == "Linux" and system.get_fs_type(topdir.name) or "unknown"
   topdir.force_scans = (fstype == "nfs" or fstype == "fuse")
-  local t, complete, entries_count = dirwatch.get_directory_files(topdir, topdir.name, "", {}, 0, timed_max_files_pred)
+  local t, complete, entries_count = dirwatch.get_directory_files(topdir, topdir.name, "", 0, timed_max_files_pred)
   topdir.files = t
   if not complete then
     topdir.slow_filesystem = not complete and (entries_count <= config.max_project_files)