Set location.hash to cloud URLs on project shares

This will make it much easier to get the URL for a shared project.
It also removes the # from the URL when the open project is unshared."

gui.js

@@ -4864,6 +4864,7 @@ ProjectDialogMorph.prototype.deleteProject = function () {
 
 ProjectDialogMorph.prototype.shareProject = function () {
     var myself = this,
+        ide = this.siblings()[0],
         proj = this.listField.selected,
         entry = this.listField.active;
 
@@ -4894,6 +4895,15 @@ ProjectDialogMorph.prototype.shareProject = function () {
                             myself.ide.cloudError(),
                             [proj.ProjectName]
                         );
+                        // Set the Shared URL if the project is currently open
+                        if (proj.ProjectName === ide.projectName) {
+                            var usr = SnapCloud.username,
+                                projectId = 'Username=' +
+                                encodeURIComponent(usr.toLowerCase()) +
+                                '&ProjectName=' +
+                                encodeURIComponent(ide.projectName);
+                            location.hash = projectId;
+                        }
                     },
                     myself.ide.cloudError()
                 );
@@ -4904,6 +4914,7 @@ ProjectDialogMorph.prototype.shareProject = function () {
 
 ProjectDialogMorph.prototype.unshareProject = function () {
     var myself = this,
+        ide = this.siblings()[0],
         proj = this.listField.selected,
         entry = this.listField.active;
 
@@ -4935,6 +4946,10 @@ ProjectDialogMorph.prototype.unshareProject = function () {
                             myself.ide.cloudError(),
                             [proj.ProjectName]
                         );
+                        // Remove the shared URL if the project is open.
+                        if (proj.ProjectName === ide.projectName) {
+                            location.hash = '';
+                        }
                     },
                     myself.ide.cloudError()
                 );