https://github.com/tracim/tracim/issues/798, fix admin button css on the header

frontend/src/css/Header.styl

@@ -24,6 +24,17 @@
       display flex
       margin-top 15px
       list-style none
+      &__adminlink
+        .adminlink
+          border 1px solid grey
+          border-radius 5px
+          &__btn
+            &::after
+              margin-left 15px
+          &__setting
+            padding 0
+            .setting__link
+              padding 10px
       &__itemsearch
         display none
         margin-right 8%