Revert as_uri() logic. Move to LocalFilesystem.

Author: davidfstr

src/crystal/filesystem/__init__.py

@@ -309,6 +309,9 @@ def copystat(self, src: str, dst: str) -> None:
         * OSError
         """
         shutil.copystat(src, dst)
+    
+    def as_uri(self, path: str) -> str:
+        return pathlib.Path(path).as_uri()
 
 
 class S3Filesystem(_AbstractFilesystem):

src/crystal/model/project.py

@@ -785,9 +785,8 @@ def _apply_migrations(self,
                     # HACK: Must also set icon location as a brittle absolute path
                     #       because Desktop Items doesn't understand the
                     #       'metadata::custom-icon-name' GIO attribute.
-                    crystalproj_png_icon_url = 'file://' + url_quote(
-                        resources_.get_filepath('docicon.png'),
-                        safe='/',
+                    crystalproj_png_icon_url = lfs.as_uri(
+                        resources_.get_filepath('docicon.png')
                     )
                     try:
                         gio.set(self.path, 'metadata::custom-icon', crystalproj_png_icon_url)