Constrain the zoom level on the map

[choquette33]

2. Is there any way we can constrain the "zoom" feature on the maps (on all parts: when on the home page, when creating reports and when looking at established reports). Volunteers get confused when they're scrolling down the page and if the mouse goes over the map, instead of the page scrolling, the map zooms way in or out. This is challenging for people who don't know that the map is also sensitive to the scroll feature. Constraints would be helpful.
   

[jenpaff]

update issue: