[CI] Validate issues have all the fields

[verytactical]

Some people forget to set

• proper title;
• milestone;
• issue type;
• and, most importantly, parent.

Help them by closing the issue. With a comment, yes.

[novusnota]

Consider:

1. Checking that task became better looking after some time interval (eh)
2. Validating title against real navigation structure in docs.json
3. Verbs! https://lists.alanwsmith.com/txt/english-verbs.txt, https://github.com/aaronbassett/Pass-phrase/blob/master/verbs.txt