fixed some inconsistencies

app/views/groups/labels/new.html.haml

+- breadcrumb_title "Labels"
 - page_title 'New Label'
 - header_title group_title(@group, 'Labels', group_labels_path(@group))

app/views/groups/milestones/new.html.haml

+- breadcrumb_title "Milestones"
 - page_title "Milestones"
 - header_title group_title(@group, "Milestones", group_milestones_path(@group))

app/views/projects/commits/show.html.haml

 - @no_container = true
+- breadcrumb_title _("Commits")
 - page_title _("Commits"), @ref
 = content_for :meta_tags do

app/views/projects/compare/show.html.haml

 - @no_container = true
+- breadcrumb_title "Compare"
 - page_title "#{params[:from]}...#{params[:to]}"
 - if show_new_nav?
   - add_to_breadcrumbs("Repository", project_tree_path(@project))

app/views/projects/environments/new.html.haml

 - @no_container = true
+- breadcrumb_title "Environments"
 - page_title 'New Environment'
 = render "projects/pipelines/head"

app/views/projects/labels/new.html.haml

 - @no_container = true
+- breadcrumb_title "Labels"
 - page_title "New Label"
 = render "shared/mr_head"

app/views/projects/milestones/new.html.haml

 - @no_container = true
+- breadcrumb_title "Milestones"
 - page_title "New Milestone"
 = render "shared/mr_head"

app/views/projects/network/show.html.haml

+- breadcrumb_title "Graph"
 - page_title "Graph", @ref
 - content_for :page_specific_javascripts do
   = page_specific_javascript_bundle_tag('network')

app/views/projects/pipelines/new.html.haml

+- breadcrumb_title "Pipelines"
 - page_title "New Pipeline"
 %h3.page-title