add the ability to see who faved or boosted a toot (#962)

* move reblog/fav count up in detailed status view and make them clickable

* use status object returned by api when reblogging/faving

* Reblogs -> Boosts

* add support for viewing who faved/reblogged a status

* add onShowReblogs/onShowFavs to listener, fix display bug

* remove unneeded icon from previous revision

* small code improvements

* fix liking/boosting toot with card

app/src/main/java/com/keylesspalace/tusky/interfaces/StatusActionListener.java

@@ -37,4 +37,17 @@ public interface StatusActionListener extends LinkListener {
      * @param position    The position of the status in the list.
      */
     void onContentCollapsedChange(boolean isCollapsed, int position);
+
+    /**
+     * called when the reblog count has been clicked
+     * @param position The position of the status in the list.
+     */
+    default void onShowReblogs(int position) {}
+
+    /**
+     * called when the favourite count has been clicked
+     * @param position The position of the status in the list.
+     */
+    default void onShowFavs(int position) {}
+
 }