Currently the cogwheel used in the previews to get to the settings is missing a meaningful title. Would also be helpful for further accessibility support with screen readers.
{F34192009}
### Acceptance Criteria
[] A title attribute is added to `.mwe-popups-settings-icon` with an i18n message (english should read "Change preview settings" pending approval from @Lena_WMDE)
### Developer Notes
This change will be in the [[ https://www.mediawiki.org/wiki/Extension:Popups | Popups extension ]]. Popups appear when you hover over article links (e.g. see https://en.wikipedia.org/wiki/Barack_Obama)
One of its steps will require adding a [[ https://www.mediawiki.org/wiki/Localisation | message ]] to `en.json` in `i18n/en.json` and a description of that message in `i18n/qqq.json`. https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/495927 might be a helpful reference to use as it was a change involving i18n messages