Fix invalid prop errors

packages/concordia-app/src/components/PostCreate/index.jsx

@@ -93,7 +93,6 @@ const PostCreate = (props) => {
                           size="big"
                           inverted
                           color="black"
-                          verticalAlign="middle"
                         />
                     )}
               </Feed.Label>

packages/concordia-app/src/components/PostList/PostListRow/index.jsx

@@ -104,7 +104,6 @@ const PostListRow = (props) => {
                       size="big"
                       inverted
                       color="black"
-                      verticalAlign="middle"
                     />
                 )}
           </Feed.Label>

packages/concordia-app/src/components/PostList/index.jsx

@@ -55,7 +55,7 @@ const PostList = (props) => {
   }, [getPostCallHashes, loading, postIds]);
 
   return (
-      <Dimmer.Dimmable as={Feed} blurring dimmed={loading} selection divided id="post-list" size="big">
+      <Dimmer.Dimmable as={Feed} blurring dimmed={loading} id="post-list" size="large">
           <Loader active={loading} />
           {posts}
       </Dimmer.Dimmable>