Always display the earliest in-development series in banners

Instead of the latest.

Author: yrodiere

_ext/release_file_parser.rb

@@ -220,6 +220,7 @@ def sortReleaseHashes(project)
               if series[:status] == nil
                 if !series.stable
                   series[:status] = 'development'
+                  project[:next_dev_series] = series
                 else
                   # By default, stable series that are not the latest are considered end-of-life'd.
                   # This can be overridden in yaml.

_ext/releases.rb

@@ -22,6 +22,11 @@ def latest_series(p = page)
         return project.latest_series
       end
 
+      def next_dev_series(p = page)
+        project = site.projects[p.project]
+        return project.next_dev_series
+      end
+
       def series(p = page, version)
         project = site.projects[p.project]
         return project.release_series[version]

_partials/project/about-buttons.html.haml

@@ -2,7 +2,7 @@
 - project_description = site.projects[real_page.project]
 - stable_series = latest_stable_series(real_page)
 - series = latest_series(real_page)
-- dev_series = series != stable_series ? series : nil
+- dev_series = next_dev_series(real_page)
 - get_started_url = project_description.nil? || stable_series.nil? ? nil : getting_started_guide(project_description, stable_series)&.html_url
 
 - if not get_started_url.nil?

_partials/project/documentation-buttons.html.haml

@@ -2,7 +2,6 @@
 - project_description = site.projects[real_page.project]
 - stable_series = latest_stable_series(real_page)
 - series = latest_series(real_page)
-- dev_series = series != stable_series ? series : nil
 - get_started_url = stable_series.nil? ? nil : getting_started_guide(project_description, stable_series)&.html_url
 
 - if not get_started_url.nil?

_partials/project/releases-buttons.html.haml

@@ -1,7 +1,7 @@
 - real_page = page["real_page"]
 - stable_series = latest_stable_series(real_page)
 - series = latest_series(real_page)
-- dev_series = series != stable_series ? series : nil
+- dev_series = next_dev_series(real_page)
 
 - if not (stable_series.nil? && dev_series.nil?)
   - unless stable_series.nil?