Move Bootstrap CSS to webui namespace

Rename main css file from "webui.css.scss" to "application.scss".
Remove `webui2/icons.scss` because the one in `webui` already has the
right content (sponsor logos and icons for obs_factory).

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

src/api/app/assets/stylesheets/webui2/webui2.css.scss → src/api/app/assets/stylesheets/webui/application.scss

@@ -8,10 +8,10 @@
  * You're free to add application-wide styles to this file and they'll appear at the top of the
  * compiled file, but it's generally better to create a new file per style scope.
  *
- *= require codemirror
- *= require peek
 */
 
+@import 'codemirror';
+@import 'peek';
 @import 'bootstrap_variables/breakpoints';
 @import 'bootstrap_variables/colors';
 @import 'bootstrap_variables/spacers';

src/api/app/views/layouts/webui/webui.html.haml

@@ -21,7 +21,7 @@
       %meta{ property: 'errbit:key', content: CONFIG['errbit_javascript_api_key'] }
       %meta{ property: 'errbit:host', content: CONFIG['errbit_javascript_host'] }
 
-    = stylesheet_link_tag 'webui2/webui2'
+    = stylesheet_link_tag 'webui/application'
     = javascript_include_tag 'webui2/application'
 
     = yield :content_for_head

src/api/config/initializers/assets.rb

@@ -8,4 +8,4 @@
 
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-Rails.application.config.assets.precompile += ['webui2/webui2.css', 'webui2/application.js', 'webui/obs_factory/application.css', 'webui2/cm2/*.js']
+Rails.application.config.assets.precompile += ['webui/application.css', 'webui2/application.js', 'webui/obs_factory/application.css', 'webui2/cm2/*.js']