Updated positioning of copy file path button in diffs

Closes #23591

app/helpers/button_helper.rb

@@ -16,13 +16,14 @@ module ButtonHelper
   # See http://clipboardjs.com/#usage
   def clipboard_button(data = {})
     css_class = data[:class] || 'btn-clipboard btn-transparent'
+    title = data[:title] || 'Copy to Clipboard'
     data = { toggle: 'tooltip', placement: 'bottom', container: 'body' }.merge(data)
     content_tag :button,
       icon('clipboard'),
       class: "btn #{css_class}",
       data: data,
       type: :button,
-      title: 'Copy to Clipboard'
+      title: title
   end
 
   def http_clone_button(project, placement = 'right', append_link: true)

app/views/projects/diffs/_file.html.haml

@@ -8,7 +8,6 @@
           = link_to '#', class: 'js-toggle-diff-comments btn active has-tooltip btn-file-option', title: "Toggle comments for this file", disabled: @diff_notes_disabled do
             = icon('comment')
           \
-          = clipboard_button(clipboard_text: diff_file.new_path, class: 'btn-file-option')
           - if editable_diff?(diff_file)
             - link_opts = @merge_request.id ? { from_merge_request_id: @merge_request.id } : {}
             = edit_blob_link(@merge_request.source_project, @merge_request.source_branch, diff_file.new_path,

app/views/projects/diffs/_file_header.html.haml

@@ -21,6 +21,8 @@
       - if diff_file.deleted_file
         deleted
 
+  = clipboard_button(clipboard_text: diff_file.new_path, class: 'btn-clipboard btn-transparent prepend-left-5', title: 'Copy filename to clipboard')
+
   - if diff_file.mode_changed?
     %small
       = "#{diff_file.a_mode} → #{diff_file.b_mode}"