Merge lp://staging/~pskoli93/postorius/Helptext-Fixes into lp://staging/postorius

If we go to a list settings page and click on the question mark to open the more info tab, a new tab opens with an error that ListSettings is not defined globally.

Initially a ListSettings form was there but now different forms have been created for different list tasks like ListIdentityForm, ListAutomaticResponseForm etc. In all these forms if a user clicks on more info tab the 'formid' is equal to 'list_settings' and every form has the same 'formid', so there is no clear way to identify for which forms' option the more info is sought.

The solution to this is that a separate list(Python list) has been created for the separate forms with the 'helpid' stored in these lists(Python list). Now if a user clicks on more info tab we check which list(Python list) it corresponds to, by comparing the 'helpid', and then loading the appropriate help text from the appropriate form.