Revert "Put author name at the end of a tree row"

This reverts commit ee0fc2c3.

app/assets/stylesheets/pages/tree.scss

@@ -60,7 +60,11 @@
   }
 
   .tree_author {
-    padding-left: 8px;
+    padding-right: 8px;
+
+    .commit-author-name {
+      color: gray;
+    }
   }
 
   .tree_commit {

app/views/projects/tree/_tree_commit_column.html.haml

 %span.str-truncated
+  %span.tree_author= commit_author_link(commit, avatar: true, size: 16)
   = link_to_gfm commit.title, namespace_project_commit_path(@project.namespace, @project, commit.id), class: "tree-commit-link"
-  %span.tree_author
-    [
-    commit_author_link(commit, avatar: false)
-    ]