List only the keywords of the ideas that are listed when a specific keyword is selected

In left sidebar, only the keywords of all the ideas on the page are listed when user has clicked to see all the ideas have a specific keyword. #51
Merge branch 'less_keywords' into development
Merge pull request #52 from hwikgren/development

List only the keywords attached to the ideas on the page when user views ideas with a specific keyword

resolves #51