Correct print scales with constrainResolution true (#1938)

Correct print scales are now retained even when
the ConstrainResolution option is true.

ConstrainResolution gets temporarily set to false
when using the print component and is restored once
the print component is closed.

src/controls/print/print-component.js

@@ -271,7 +271,8 @@ const PrintComponent = function PrintComponent(options = {}) {
     titleComponent,
     descriptionComponent,
     createdComponent,
-    closeButton
+    closeButton,
+    constrainResolution: view.getConstrainResolution()
   });
 
   const setScale = function setScale(scale) {

src/controls/print/print-resize.js

@@ -19,7 +19,8 @@ export default function PrintResize(options = {}) {
     titleComponent,
     descriptionComponent,
     createdComponent,
-    closeButton
+    closeButton,
+    constrainResolution
   } = options;
 
   let {
@@ -404,6 +405,8 @@ export default function PrintResize(options = {}) {
   // Alters layer in map, if vector then set scale for feature, if image set DPI parameter for source
   const setLayerScale = function setLayerScale(layer) {
     const source = layer.getSource();
+    const view = map.getView();
+    view.setConstrainResolution(false);
 
     if (isVector(layer)) {
       const styleName = layer.get('styleName');
@@ -467,6 +470,8 @@ export default function PrintResize(options = {}) {
   // "Resets" layer by resetting the style and removing DPI parameter
   const resetLayerScale = function resetLayerScale(layer) {
     const source = layer.getSource();
+    const view = map.getView();
+    view.setConstrainResolution(constrainResolution);
     if (isVector(layer)) {
       const features = source.getFeatures();
       const styleName = layer.get('styleName');