Update check should direct to HTTPS

[Slavic]

When we use an option in main menu "Check for updates now" and a new version of TC is released, a browser by default opens the page http://www.ghisler.com/mailing.htm

I suggest to direct the browser to HTTPS version of that page instead. Quite soon Chrome will mark all non-https pages as potentially "not secure", and I suppose that most other widely used browsers will follow. You can read this in many news sources, for example, here:
https://betanews.com/2018/05/18/google-chrome-https-security-warnings/

There are other links in TC menus to ghisler.com website, it would also be better to direct them to HTTPS.

[ghisler(Author)]

OK, changed all links to https, also in the Help menu. Note that the update check in beta 4 will still send you to http.