Fix invalid html

[nikhilraojl]

• src\index.html

  • SyntaxError: Void elements do not have end tags "link"
  • SyntaxError: Void elements do not have end tags "img"
  • SyntaxError: Void elements do not have end tags "input"
  • SyntaxError: Unexpected closing tag "p". It may happen when the tag has already been closed by another tag
  • SyntaxError: Unexpected closing tag "body"

• src\js\app\components\authentication\authentication_view.html

  • SyntaxError: Void elements do not have end tags "input"

• src\js\app\components\bookmarks\bookmarks_view.html

  • SyntaxError: Void elements do not have end tags "input"

• src\js\app\components\entry-list\entryList_view.html

  • SyntaxError: Void elements do not have end tags "input"

Related to #187 issue, format codebase

[mirkoperillo]

@nikhilraojl LGTM