Removed local tiled layer when re-running sample; added buttons to manually delete the local layer and reset the map.
Export tile cache updates to Store sample. Added "Remove local layer" and "Reset map" buttons. Also changed so that after exporting the tile cache you need to regenerate the AOI/Estimate cache size before exporting tiles again.
Merge pull request #46 from Esri/kdalton/ExportTileCache

Export tile cache sample fixes [Desktop & Store]