Refresh commented-channels list when deleting a comment

Users should be allowed to clear their past comments and switch to another channel.

flow-typed/Lbry.js

@@ -155,6 +155,7 @@ declare type CommentPinResponse = {
 declare type CommentAbandonResponse = {
   // keyed by the CommentId given
   abandoned: boolean,
+  claim_id: string,
 };
 
 declare type ChannelListResponse = {

ui/redux/actions/comments.js

@@ -831,6 +831,9 @@ export function doCommentAbandon(
               comment_id: commentId,
             },
           });
+
+          // Update the commented-channels list.
+          dispatch(doFetchMyCommentedChannels(result.claim_id));
         } else {
           dispatch({
             type: ACTIONS.COMMENT_ABANDON_FAILED,