Added widget with reviews Google Reviews - Api (Google My Business).

Added widget with reviews Google Reviews - Api (Google My Business).
The widget allows you to receive reviews about your company from your Google My Business profile.
Google Reviews - Api

Added registration letter template on the site.
Added the ability to specify an additional SMTP server for sending via the Database of e-mail addresses.
Added a function to display the values selected in the search filter at the top of the page.