fixes #1774 - Preview resource
                    - remove two column layout + fix height when resource can't be previewed
fixes #1781 - Speed up the ebola map tiles
                    - general cleanup of the data used in the crisis page
fixes #1793 - Ebola Page: leaflet overlays user menu
fixes #1619 - Dataset/Indicator Detail: location list not aligned with other metadata
                    - changed margin and replaced it with one space
                    - also fixed weird spaces being generated
Merge pull request #1800 from OCHA-DAP/arti-sprint-40

Arti sprint 40