core (constants): don't parse sat.conf from current dir anymore + parse root_dir last

sat/core/constants.py

@@ -455,11 +455,12 @@ if (
         import os
         root_dir = Path(sat.__file__).parent
         Const.CONFIG_PATHS = (
-            ["/etc/", "~/", "~/.", "", root_dir, "."]
+            ["/etc/", "~/", "~/."]
             + [
                 "%s/" % path
                 for path in list(BaseDirectory.load_config_paths(Const.APP_NAME_FILE))
             ]
+            + [root_dir]
         )
 
         # on recent versions of Flatpak, FLATPAK_ID is set at run time