Improving usability of command popup menus

For a command button in a menu, its secondary (cascading) popup should be shown on mouse rollover and not on press, For such a cascading popup menu, the relevant parts of the cascade should be hidden when the user moves the mouse anywhere outside the cascade path bounds

Increase initial delay to show rich tooltip to 750ms

For #65

common/src/desktopMain/kotlin/org/pushingpixels/aurora/common/AuroraPopupManager.kt

@@ -133,9 +133,16 @@ object AuroraPopupManager {
         pointInOriginator: Offset
     ): Boolean {
         val match = shownPath.reversed().find {
-            (it.popup == originator) &&
+            (it.originatorPopup == originator) &&
                     (it.popupTriggerAreaInOriginatorWindow.contains(pointInOriginator))
         }
         return match != null
     }
+
+    fun dump() {
+        println("Popups")
+        for (link in shownPath) {
+            println("\tOriginator ${link.originatorPopup.javaClass.simpleName}@${link.originatorPopup.hashCode()}")
+        }
+    }
 }