Use gitlab pagination theme for builds and group members.

app/views/dashboard/groups/index.html.haml

@@ -16,4 +16,4 @@
     - group = group_member.group
     = render 'shared/groups/group', group: group, group_member: group_member
-= paginate @group_members
+= paginate @group_members, theme: 'gitlab'

app/views/projects/builds/index.html.haml

@@ -48,5 +48,5 @@
       - @builds.each do |build|
         = render 'projects/builds/build', build: build
-    = paginate @builds
+    = paginate @builds, theme: 'gitlab'