ADFA-3418: Unregister the flashbar config callback when the bar detaches

The dismiss paths unregister from a post{} that never runs once the view is detached, so a flashbar still showing when its activity was destroyed left a ComponentCallbacks on the Application holding that activity. Reproduced by a dark-mode recreate under the indefinite 'Project initialization failed' bar (ADFA-5528).

Author: hal-eisen-adfa

subprojects/flashbar/src/main/java/com/itsaky/androidide/flashbar/FlashbarContainerView.kt

@@ -106,6 +106,13 @@ internal class FlashbarContainerView(context: Context)
         return super.onInterceptTouchEvent(event)
     }
 
+    // The dismiss paths unregister from a post{}, which never runs once the view is detached, so a
+    // bar still up when its activity is destroyed left the callback holding that activity.
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        unregisterConfigurationCallback()
+    }
+
     override fun onSwipe(isSwiping: Boolean) {
         isBarDismissing = isSwiping
         if (isSwiping) {