Merge branch 'fix-participants-style' into 'master'

Fix participants css

Closes #2423

See merge request !1924

app/assets/stylesheets/pages/issuable.scss

@@ -444,9 +444,6 @@
 }
 
 .participants-list {
-  display: flex;
-  flex-wrap: wrap;
-  justify-content: space-between;
   margin: -5px;
 }
 
@@ -456,9 +453,13 @@
 }
 
 .participants-author {
-  flex-basis: 14%;
+  display: inline-block;
   padding: 5px;
 
+  &:nth-of-type(7n) {
+    padding-right: 0;
+  }
+
   .author_link {
     display: block;
   }