[lint] Update editorconfig linting:

- Add settings for comments.
- Remove custom settings that don’t work.
- Fix vendor JS file:

.editorconfig

@@ -12,6 +12,11 @@ indent_style = space
 insert_final_newline = true
 max_line_length = 100
 
+# C-style doc comments
+block_comment_start = /*
+block_comment = *
+block_comment_end = */
+
 [{bw-dev,fr-dev,LICENSE}]
 max_line_length = off