Make labels clickable

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

app/views/projects/issues/_issue.html.haml

@@ -31,6 +31,7 @@
 
     .issue-labels
       - issue.labels.each do |label|
+        = link_to project_issues_path(issue.project, label_name: label.name) do
           = render_colored_label(label)
 
   .issue-actions

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

@@ -68,6 +68,7 @@
 
   .issue-show-labels.pull-right
     - @issue.labels.each do |label|
+      = link_to project_issues_path(@project, label_name: label.name) do
         = render_colored_label(label)
 
 .voting_notes#notes= render "projects/notes/notes_with_form"

app/views/projects/merge_requests/_merge_request.html.haml

@@ -34,4 +34,5 @@
 
     .merge-request-labels
       - merge_request.labels.each do |label|
+        = link_to project_merge_requests_path(merge_request.project, label_name: label.name) do
           = render_colored_label(label)

app/views/projects/merge_requests/show/_participants.html.haml

@@ -5,4 +5,5 @@
 
   .merge-request-show-labels.pull-right
     - @merge_request.labels.each do |label|
+      = link_to project_merge_requests_path(@project, label_name: label.name) do
         = render_colored_label(label)