theme: Remove invalid button styling

There is no ".message-list-clear-button .button" selector, but
".message-list-clear-button.button". To make it clear, this commit adds
.button to .message-list-clear-button.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/931

diff --git a/data/theme/gnome-shell-sass/widgets/_message-list.scss b/data/theme/gnome-shell-sass/widgets/_message-list.scss
index b0e2b491dcd89de58e246b6e04672fb3c3f1c9b5..0a68c90b9fb844ae035834353fe57ff86903a527 100644 (file)
--- a/data/theme/gnome-shell-sass/widgets/_message-list.scss
+++ b/data/theme/gnome-shell-sass/widgets/_message-list.scss
@@ -23,11 +23,8 @@
 }
 
 // clear button
-.message-list-clear-button {
+.message-list-clear-button.button {
   margin:$base_margin $base_margin*2;
-  .button {
-    @extend %button;
-  }
 }
 
 // message bubbles