Replace PanZoom control with Zoom control for small maps

In OpenLayers 2.12 the event handling of PanZoom and PanZoomBar clashes
with the result that the zoom level changes by two steps every time one
of the zoom buttons is pressed. Using the Zoom control fixes this issue.

app/assets/javascripts/map.js.erb

@@ -13,7 +13,7 @@ function createMap(divName, options) {
          new OpenLayers.Control.Attribution(),
          new SimpleLayerSwitcher(),
          new OpenLayers.Control.Navigation(),
-         new OpenLayers.Control.PanZoom(),
+         new OpenLayers.Control.Zoom(),
          new OpenLayers.Control.PanZoomBar(),
          new OpenLayers.Control.ScaleLine({geodesic: true})
       ],

app/assets/stylesheets/common.css.scss

@@ -898,7 +898,7 @@ p#contributorGuidance {
   display: none;
 }
 
-.user_map .olControlPanZoom {
+.user_map .olControlZoom {
   display: block;
 }
 

app/assets/stylesheets/large.css

@@ -14,6 +14,6 @@
 
 /* Rules for OpenLayers maps */
 
-.olControlPanZoom {
+.olControlZoom {
   display: none;
 }

app/assets/stylesheets/print.css

@@ -26,7 +26,7 @@
   display: none;
 }
 
-.olControlPanZoom {
+.olControlZoom {
   display: none;
 }
 

app/views/changeset/_map.html.erb

@@ -41,7 +41,7 @@
     var map = createMap("changeset_list_map", {
       controls: [
         new OpenLayers.Control.Navigation(),
-        new OpenLayers.Control.PanZoom(),
+        new OpenLayers.Control.Zoom(),
         new OpenLayers.Control.PanZoomBar()
       ]
     });

config/openlayers.cfg

@@ -10,6 +10,7 @@ OpenLayers/Control/DrawFeature.js
 OpenLayers/Control/LayerSwitcher.js
 OpenLayers/Control/Navigation.js
 OpenLayers/Control/PanZoomBar.js
+OpenLayers/Control/Zoom.js
 OpenLayers/Control/PinchZoom.js
 OpenLayers/Control/ScaleLine.js
 OpenLayers/Control/SelectFeature.js

public/export/embed.html

@@ -94,7 +94,7 @@
             if (size.h > 320) {
                 map.addControl(new OpenLayers.Control.PanZoomBar());
             } else {
-                map.addControl(new OpenLayers.Control.PanZoom());
+                map.addControl(new OpenLayers.Control.Zoom());
             }
         }
     // -->