Address issues found in lib/views/mapView.js [Opened by bitHound]

 bitHound discovered 47 Lint Issues, 1 Complex Function, and 1 Todo Comment in [lib/views/mapView.js](https://github.com/metamaps/mapmaker/blob/aad50f928c723d98a076d248c5f536511adff5f9/lib/views/mapView.js). For details go to [bitHound](https://www.bithound.io/github/metamaps/mapmaker/blob/aad50f928c723d98a076d248c5f536511adff5f9/lib/views/mapView.js). 
