The installed beta versions should not be filtered

The filter beta out should apply only to unregistered add-ons.

src/lib/registration/ui/addon_selection_base_dialog.rb

@@ -71,7 +71,12 @@ def addon_widget_id(addon)
       # @param [Boolean] enable true for filtering beta releases
       def filter_beta_releases(enable)
         self.class.filter_beta = enable
-        @addons = enable ? @all_addons.reject(&:beta_release?) : @all_addons
+        if enable
+          @addons, available_addons = @all_addons.partition(&:registered?)
+          @addons.concat(available_addons.reject(&:beta_release?))
+        else
+          @addons = @all_addons
+        end
       end
 
     private

test/addon_selection_dialog_test.rb

@@ -20,7 +20,8 @@
   describe "#initialize" do
     it "sets the beta filter to the previous state" do
       fake_ref = double.as_null_object
-      res = described_class.new(fake_ref)
+      registration = double(activated_products: [], get_addon_list: [])
+      res = described_class.new(registration)
       res.send(:filter_beta_releases, false)
 
       expect_any_instance_of(described_class).to receive(:filter_beta_releases).with(false)