Add 'New file' link to dropdown on project page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CHANGELOG

@@ -17,6 +17,7 @@ v 8.2.0 (unreleased)
   - Remove deprecated CI events from project settings page
   - Use issue editor as cross reference comment author when issue is edited with a new mention.
   - [API] Add ability to fetch the commit ID of the last commit that actually touched a file
+  - Add "New file" link to dropdown on project page
 v 8.1.1
   - Fix cloning Wiki repositories via HTTP (Stan Hu)

app/views/projects/buttons/_dropdown.html.haml

@@ -20,6 +20,10 @@
             New snippet
       - if can?(current_user, :push_code, @project)
         %li.divider
+        %li
+          = link_to namespace_project_new_blob_path(@project.namespace, @project, @project.default_branch || 'master'), title: 'New file' do
+            = icon('file fw')
+            New file
         %li
           = link_to new_namespace_project_branch_path(@project.namespace, @project) do
             = icon('code-fork fw')