Search: limit max zoom when zooming to feature

[jacobwod]

Currently when user selects a result in the search results list we zoom into the selected feature's extent:

Users have reported that for some layers, they would prefer a less zoomed in view than what is currently happening.

Yet, we need to decide if this should be a per-map-setting or a per-layer-setting. Both cases are valid but I'm not sure which is of more use for admins.

Second, this will require some rewriting of the zoom mechanism, as we zoom into extent now, not a zoom level.

[Hallbergs]

Should be an easy fix. You can add maxZoom to the fit method. (Which fitMapToExtent is based on.)