[dashboard] fix map center change shows unsaved change after clicking…

… reset (elastic#213445)

Closes elastic#213444

The problem is setting the view with the globe view may not set the view
to the exact value. For example setting zoom to 1.74 may move the map to
zoom 1.77. PR resolves this problem by adding a margin of error for
comparing zoom differences.

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
(cherry picked from commit ea266bc)

x-pack/platform/plugins/shared/maps/public/react_embeddable/initialize_redux_sync.ts

@@ -219,7 +219,16 @@ export function initializeReduxSync({
         (nextValue: MapCenterAndZoom) => {
           store.dispatch(setGotoWithCenter(nextValue));
         },
-        fastIsEqual,
+        (a, b) => {
+          if (!a || !b) {
+            return a === b;
+          }
+
+          if (a.lat !== b.lat) return false;
+          if (a.lon !== b.lon) return false;
+          // Map may not restore reset zoom exactly
+          return Math.abs(a.zoom - b.zoom) < 0.05;
+        },
       ],
       openTOCDetails: [
         openTOCDetails$,