#1254 - fix popular icon functionality
#1254 - added indicator section
           - filtered indicators to show only indicators and datasets only datasets
           - added snippets for indicators that inherit the dataset snippets
           - other styling fixes
#1254 - change in controller so that the default tab is "ALL"
#1254 - fix in follow dataset + temporary actions for the preview/download links
#1254 - functionality so that tabs show only the intended information
fixing some minor bugs. Closes #1251
Merge pull request #1287 from OCHA-DAP/search_controller

Search controller