remove excessive margin, refresh feed anew, closes #595

app/src/main/java/awais/instagrabber/customviews/PostsRecyclerView.java

@@ -289,6 +289,7 @@ public class PostsRecyclerView extends RecyclerView {
             lazyLoader.resetState();
         }
         if (postFetcher != null) {
+            mediaViewModel.getList().postValue(Collections.emptyList());
             postFetcher.reset();
             postFetcher.fetch();
         }

app/src/main/java/awais/instagrabber/utils/DownloadUtils.java

@@ -135,7 +135,7 @@ public final class DownloadUtils {
                                             final String postId,
                                             final String sliderPostfix,
                                             final String displayUrl) {
-        final String fileName = postId + sliderPostfix + "." + getFileExtensionFromUrl(displayUrl);
+        final String fileName = postId + sliderPostfix + getFileExtensionFromUrl(displayUrl);
         return new File(finalDir, fileName);
     }
 

app/src/main/res/layout/fragment_story_viewer.xml

@@ -9,7 +9,6 @@
         android:id="@+id/story_container"
         android:layout_width="match_parent"
         android:layout_height="0dp"
-        android:layout_marginTop="?attr/actionBarSize"
         android:layout_weight="1"
         app:layout_constraintBottom_toTopOf="@id/storiesList"
         app:layout_constraintEnd_toEndOf="parent"