Show search source badges only with show_sources param

The badges are a debugging aid - render them only when explicitly
requested via ?show_sources=1 instead of on every search.

app/helpers/packages_helper.rb

@@ -1,4 +1,10 @@
 module PackagesHelper
+  # Search result origin badges are only shown when explicitly
+  # requested via ?show_sources=1
+  def search_sources_visible?
+    params[:show_sources].present?
+  end
+
   # Human readable label for the search strategy that put a package
   # into the search results (see PackagesController#search_packages)
   def search_source_label(source)

app/views/packages/browse.slim

@@ -24,7 +24,7 @@
                   = pkg.name
                 .text
                   = pkg.description
-                - if @search_sources[pkg.id]
+                - if search_sources_visible? && @search_sources[pkg.id]
                   .text.search-source
                     span.label.secondary = search_source_label(@search_sources[pkg.id])
       - elsif @view_style==:list
@@ -40,7 +40,7 @@
                 a href=package_path(name: pkg.name)
                   =pkg.name
               p =pkg.description
-              - if @search_sources[pkg.id]
+              - if search_sources_visible? && @search_sources[pkg.id]
                 p
                   span.label.secondary = search_source_label(@search_sources[pkg.id])
               .listview.longdescription