Added a clipboard button to the "Branches" page in "Repository"

Changelog: added

app/views/projects/branches/_branch.html.haml

@@ -7,6 +7,7 @@
       = sprite_icon('branch', size: 12, css_class: 'gl-flex-shrink-0')
       = link_to project_tree_path(@project, branch.name), class: 'item-title str-truncated-100 ref-name gl-ml-3 qa-branch-name' do
         = branch.name
+      = clipboard_button(text: branch.name, title: _("Copy branch name"))
       - if branch.name == @repository.root_ref
         = gl_badge_tag s_('DefaultBranchLabel|default'), { variant: :info, size: :sm }, { class: 'gl-ml-2' }
       - elsif merged

spec/features/projects/branches_spec.rb

@@ -36,6 +36,8 @@ RSpec.describe 'Branches' do
           expect(page).to have_content(sorted_branches(repository, count: 5, sort_by: :updated_desc, state: 'active'))
           expect(page).to have_content(sorted_branches(repository, count: 4, sort_by: :updated_asc, state: 'stale'))
 
+          expect(page).to have_button('Copy branch name')
+
           expect(page).to have_link('Show more active branches', href: project_branches_filtered_path(project, state: 'active'))
           expect(page).not_to have_content('Show more stale branches')
         end