[webui] Fix preserving package elements

Fix preserving package elements after editing a patchinfo.

Co-authored-by: David Kang <dkang@suse.com>

src/api/app/controllers/webui/patchinfo_controller.rb

@@ -95,6 +95,9 @@ def save
         node.rating params[:rating].try(:strip)
         node.summary params[:summary].try(:strip)
         node.description params[:description].gsub("\r\n", "\n")
+        @file.each(:package) do |pkg|
+          node.package pkg.text
+        end
         node.message params[:message].gsub("\r\n", "\n") if params[:message].present?
         node.reboot_needed if params[:reboot]
         node.relogin_needed if params[:relogin]