Allow adding queried features in turn using the "previous" and "next" bypass block buttons

[ahmadayubi]

When a query is made it returns mapml features, there can be multiple features. @prushforth suggested that it should be possible to add one of those features at a time by using the "previous" and "next" bypass block buttons.

Behavior example:
If a query returns 4 features, only the first feature is added to the map.
To view the other 3 features, the user needs to click next, this removes the current feature and adds the next one.
Only 1/n features (n being all the features returned) from the query would be visible/on the map at a time.
Only the <properties> content of the current feature i of n (where i is the current feature iteration, n being all features returned) would be the content of the popup.