New option: space-before-closing-brace
Fix options order

`block-indent` handler should be called before `sort-order` for group delimiters
(empty lines) not to have extra whitespace.
Vendor prefix align: Check that node exists
Block indent: Round number of detected spaces
Block indent: Handle conflicting detected options
Update tests

Update integral tests.
Add test to detect both `block-indent` and `space-before-closing-brace` options.