UX: adds focus state on open-toolbar-btn (#513)

UX: adds focus state on open-toolbar-btn (#513)

diff --git a/assets/stylesheets/common/common.scss b/assets/stylesheets/common/common.scss
index 81c1d8c..87c7151 100644
--- a/assets/stylesheets/common/common.scss
+++ b/assets/stylesheets/common/common.scss
@@ -579,6 +579,11 @@ body.composer-open .topic-chat-float-container {
         padding: 0.4em;
         border-radius: 100%;
         background: var(--primary-low);
+        border: 1px solid transparent;
+
+        &:focus {
+          border-color: var(--tertiary);
+        }
       }
     }
 

GitHub sha: f29ab1415aba8f80e0b8917c21a515f8713b8876

This commit appears in #513 which was approved by ZogStriP. It was merged by jjaffeux.