Use 'selectHasChannel' instead of the full 'selectMyChannelClaims'

- selectMyChannelClaims depends on `byId`, which currently is always invalidated per update, so it is not memoized.

- Most of the use-cases just needs the ID or the length of the array anyways, so avoid generating a Claim array (in selectMyChannelClaims) unnecessarily -- the client need to reduce it back down to IDs again :/

- The simpler boolean also removes the need to memoize the selector, which saves a bit of memory.

ui/component/commentsReplies/index.js

@@ -1,6 +1,6 @@
 import { connect } from 'react-redux';
 import { doResolveUris } from 'redux/actions/claims';
-import { makeSelectClaimIsMine, selectMyChannelClaims, makeSelectClaimForUri } from 'redux/selectors/claims';
+import { makeSelectClaimIsMine, selectMyChannelClaimIds, makeSelectClaimForUri } from 'redux/selectors/claims';
 import { selectIsFetchingCommentsByParentId, selectRepliesForParentId } from 'redux/selectors/comments';
 import { selectUserVerifiedEmail } from 'redux/selectors/user';
 import CommentsReplies from './view';
@@ -17,7 +17,7 @@ const select = (state, props) => {
     resolvedReplies,
     claimIsMine: makeSelectClaimIsMine(props.uri)(state),
     userCanComment: IS_WEB ? Boolean(selectUserVerifiedEmail(state)) : true,
-    myChannels: selectMyChannelClaims(state),
+    myChannelIds: selectMyChannelClaimIds(state),
     isFetchingByParentId: selectIsFetchingCommentsByParentId(state),
   };
 };