Merge pull request #4 from ChrisBoesch/master

merging updates
hotfix(problemEdit): requried to select valid answer

Signed-off-by: A. Prooks <aprooks@live.ru>
hotfix: videos create page link to Icon

Signed-off-by: A. Prooks <aprooks@live.ru>
Merge pull request #36 from aprooks/master

question without valid answer could be created