Load tour CSS in the Seven theme only when the module enabled

FiIe tour.theme.css has been already moved to the Seven theme. I assume it was done in some other issue, but probably file should be renamed to tour.css

Added patch

Rerroled patch.

Rerroled patch.

+++ b/core/modules/tour/tour.module
@@ -44,7 +86,7 @@ function tour_toolbar() {
-  $items['tour'] += array(
+  $items['tour'] = array(

that hardly overrides, are you sure that needed?

Re-rolled path.

Applayed patch for new 8.0.x

Different approach - tour theme should be added from seven theme only when tour module enabled

Related CR https://www.drupal.org/node/2497313

1. +++ b/core/modules/tour/tour.module
   @@ -8,6 +8,48 @@
   +function tour_library_info_alter(&$libraries, $extension) {
   

   the module should not care about themes at all

2. +++ b/core/themes/seven/seven.libraries.yml
   @@ -29,7 +29,7 @@ global-styling:
   -      css/components/tour.theme.css: {}
   +      css/components/tour.css: {}
   

   I think this file should be attached conditionally when tour module enabled
   so better to use hook_library_info_alter() in seven theme instead of library_extend

Styles moved to seven theme, all ok as i see.

This could use a title and issue summary update since it's not really doing what is described, it's just changing Seven's tour CSS to load more conditionally.

Since this is an optimization of when the tour CSS is loaded I don't think it makes sense to commit to 8.0.x. Also, the risk is low in committing to 8.1.x because the only selectors in Seven's tour.theme.css are from joyride.

Committed 8d48a88 and pushed to 8.1.x. Thanks!

Yes! libraries-extend saves the day once again :)