[Projects] Editor: brining the highlighted app's icon into the foreground. + minor UI fixes

src/modules/Projects/ProjectsEditor/ViewModels/MainViewModel.cs

@@ -314,5 +314,13 @@ namespace ProjectsEditor.ViewModels
         {
             GC.SuppressFinalize(this);
         }
+
+        internal void CloseAllPopups()
+        {
+            foreach (Project project in Projects)
+            {
+                project.IsPopupVisible = false;
+            }
+        }
     }
 }