Put author name at the end of a tree row

Signed-off-by: Sven Strickroth <email@cs-ware.de>

app/assets/stylesheets/pages/tree.scss

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