Fix map name parsing in permalink store getState() function (#2016)

* Fix map name parsing in permalink store getState() function

* Refactor permalinkStore.js to extract map name without .json extension

This commit refactors permalinkStore.js to extract the map name without the .json extension. The code now uses the lastIndexOf method to find the last occurrence of the '.' character and extracts the substring before it. This improves the readability and maintainability of the code.

* Fix bug in permalinkstore.js for handling map names with periods.

src/permalink/permalinkstore.js

@@ -103,8 +103,9 @@ permalinkStore.getState = function getState(viewer, isExtended) {
     state.pin = getPin().getGeometry().getCoordinates().map(coord => Math.round(coord))
       .join();
   }
-  if (viewer.getMapName()) {
-    state.map = viewer.getMapName().split('.')[0];
+  if (viewer.getMapName() && viewer.getMapName().indexOf('.') !== -1) {
+    const lastPointIndex = viewer.getMapName().lastIndexOf('.');
+    state.map = viewer.getMapName().substring(0, lastPointIndex);
   }
 
   Object.keys(additionalMapStateParams).forEach((key) => additionalMapStateParams[key](state));