[JENKINS-18029] Selected line with static analysis violation is hidden because breadcrumb covers it

- The page with source code now scrolls 10 lines above the highlighted one to be able to see the context.
- @SuppressWarnings("unused") removed to solve compiler warnings.
Merge pull request #4 from mixalturek/master

[JENKINS-18029] Selected line with static analysis violation is hidden because breadcrumb covers it