Fixes crash occuring when the blog post request response arrives when the fragment does not exists

app/src/main/java/net/pokeranalytics/android/ui/modules/feed/FeedFragment.kt

@@ -274,11 +274,11 @@ class FeedFragment : FilterableFragment(), RowRepresentableDelegate, PurchaseLis
 			retrieveLatestBlogPosts() // attempt to retrieve blog tips on display
 		}
 
-		displayPostButton()
+		displayBlogPostButton()
 		binding.postButton.setOnClickListener {
 			Preferences.setBlogTipsTapped(requireContext())
 			parentActivity?.openUrl(URL.BLOG_TIPS.value)
-			displayPostButton()
+			displayBlogPostButton()
 		}
 
 		binding.postButton.viewTreeObserver.addOnGlobalLayoutListener {
@@ -587,23 +587,26 @@ class FeedFragment : FilterableFragment(), RowRepresentableDelegate, PurchaseLis
 		if (Preferences.shouldShowBlogTips(requireContext()) && Preferences.getLastBlogTipsRetrievalDate(requireContext()) + 24 * 3600 * 1000 < now) {
 
 			BlogPostApi.getLatestPosts(requireContext()) { posts ->
-				Preferences.setLastBlogTipsRetrievalDate(now, requireContext())
 
-				var count = 0
-				if (posts.isNotEmpty()) {
-					Preferences.setLatestRetrievedBlogPostId(posts.first().id, requireContext())
+				context?.let {
+					Preferences.setLastBlogTipsRetrievalDate(now, requireContext())
+					var count = 0
+					if (posts.isNotEmpty()) {
+						Preferences.setLatestRetrievedBlogPostId(posts.first().id, requireContext())
 
-					val id = Preferences.getLatestDisplayedBlogPostId(requireContext())
+						val id = Preferences.getLatestDisplayedBlogPostId(requireContext())
 
-					count = posts.count { it.id > id }
+						count = posts.count { it.id > id }
+					}
+					displayBlogPostButton(count)
 				}
-				displayPostButton(count)
+
 			}
 		}
 
 	}
 
-	private fun displayPostButton(newCount: Int = 0) {
+	private fun displayBlogPostButton(newCount: Int = 0) {
 		var show = false
 		if (Preferences.shouldShowBlogTips(requireContext()) && newCount > 0) {
 			show = true