Add Open/Closed/All nav buttons to Jira issues

- Move setting of default_state to controller action since it's
used to determine which of the tabs is active by default.
- Add Open/Closed/All nav buttons to Jira issues and align
"Create new Jira issue" button to follow mocks.
- Update Vue app to handle `state` gracefully.

app/assets/javascripts/issuables_list/components/issuables_list_app.vue

@@ -293,7 +293,7 @@ export default {
       this.filters = filters;
     },
     refetchIssuables() {
-      const ignored = ['utf8', 'state'];
+      const ignored = ['utf8'];
       const params = omit(this.filters, ignored);
 
       historyPushState(setUrlParams(params, window.location.href, true, true));

ee/app/controllers/projects/integrations/jira/issues_controller.rb

@@ -18,6 +18,8 @@ module Projects
         rescue_from ::Projects::Integrations::Jira::IssuesFinder::RequestError, with: :render_request_error
 
         def index
+          params[:state] = default_state if params[:state].blank?
+
           respond_to do |format|
             format.html
             format.json do
@@ -46,7 +48,6 @@ module Projects
         end
 
         def finder_options
-          params[:state] = default_state if params[:state].blank?
           options = { sort: set_sort_order }
 
           # Used by view to highlight active option

ee/app/views/projects/integrations/jira/issues/_nav_btns.html.haml

-.nav-controls.issues-nav-controls.gl-my-5
-  = link_to @project.external_issue_tracker.new_issue_url, class: 'btn gl-button', target: '_blank', rel: 'noopener noreferrer' do
+.nav-controls.issues-nav-controls
+  = link_to @project.external_issue_tracker.new_issue_url, class: 'btn gl-button gl-align-self-start', target: '_blank', rel: 'noopener noreferrer' do
     = _('Create new issue in Jira')
     = sprite_icon('external-link', css_class: 'gl-ml-1')

ee/app/views/projects/integrations/jira/issues/index.html.haml

 - page_title _('Jira Issues')
 
-.top-area.gl-border-b-0.gl-justify-content-end
+.top-area.gl-border-b-0.gl-mt-6
+  = render 'shared/issuable/nav', type: :issues, display_count: false
   = render 'projects/integrations/jira/issues/nav_btns'
 
 .js-issuables-list{ data: { endpoint: expose_path(project_integrations_jira_issues_path(@project, format: :json)),