[master] fixed the remember me option and corrected the image upload in the registration
A thumbnail image is displayed next to the authors comment

**Summary:** A smaller and lighter picture of the author of a comment is displayed next to it.
Blacklist button has been added to user actions panel

**Summary:** The possibility of blacklist another user has been implemented: The user has a blacklist button right in the user actions panel, in the left part of the screen.
A popular icon is displayed next to a user that has more than N followers

**Summary:** A popular icon is displayed next to a user that has more than N followers, where N is a parameter loaded from a .properties file.