force identifier to be int when possible

frontend-js/src/main/js/map/data/IdentifiedElement.js

@@ -97,6 +97,12 @@ IdentifiedElement.prototype.getId = function() {
 };
 
 IdentifiedElement.prototype.setId = function(id) {
+
+  // some elements are identfied by id that is not a number (like point on the
+  // map)
+  if (!isNaN(id)) {
+    id = parseInt(id);
+  }
   this.id = id;
 };
 

frontend-js/src/main/js/map/data/LayoutAlias.js

@@ -41,7 +41,7 @@ LayoutAlias.prototype.getId = function() {
 };
 
 LayoutAlias.prototype.setId = function(id) {
-  this.id = id;
+  this.id = parseInt(id);
 };
 
 LayoutAlias.prototype.getValue = function() {

frontend-js/src/main/js/map/data/LayoutData.js

@@ -43,7 +43,7 @@ LayoutData.prototype.getName = function() {
 };
 
 LayoutData.prototype.setId = function(id) {
-  this.id = id;
+  this.id = parseInt(id);
 };
 
 LayoutData.prototype.setName = function(name) {

frontend-js/src/main/js/map/data/LayoutReaction.js

@@ -18,7 +18,7 @@ LayoutReaction.prototype.getId = function() {
 };
 
 LayoutReaction.prototype.setId = function(id) {
-  this.id = id;
+  this.id = parseInt(id);
 };
 
 LayoutReaction.prototype.getWidth = function() {

frontend-js/src/main/js/map/data/Project.js

@@ -42,7 +42,7 @@ Project.prototype.getId = function() {
 };
 
 Project.prototype.setId = function(id) {
-  this._id = id;
+  this._id = parseInt(id);
 };
 Project.prototype.getProjectId = function() {
   return this._projectId;

frontend-js/src/main/js/map/data/Reaction.js

@@ -45,7 +45,7 @@ Reaction.prototype.getId = function() {
 };
 
 Reaction.prototype.setId = function(id) {
-  this.id = id;
+  this.id = parseInt(id);
 };
 
 Reaction.prototype.getCenter = function() {