Fix sort dropdown border on ../forks#index
Summary
gl_redirect_listbox_tag
does not allow customization of the classes used which can cause a slight UI glitch when it is displayed right next to another element that would expect a straight border instead of the curved one. As shown in this comment on the MR where the issue was brought up.
Improvements
gl_redirect_listbox_tag
needs to have an option to influence how the border is drawn so it can avoid the rounded corners on the borders where needed.
Nest the dropdown properly in group so the :n-th child CSS corrects the border raidus
Risks
We will probably need to check a lot of the Pajamas transitions done to see if this border UI glitch also needs to be fixed there. Not necessarily a risk per sé but something to keep an eye out for.
Involved components
app/helpers/listbox_helper.rb:36:1
app/views/projects/forks/index.html.haml b/app/views/projects/forks/index.html.haml