fixed?

.atom/packages/atom-material-ui/styles/dropdowns.less

@@ -1,15 +0,0 @@
-.dropdown-menu {
-    background-color: @overlay-background-color;
-    border-radius: 0;
-    border: 1px solid @base-border-color;
-    padding: 0;
-
-    > li > a {
-        .text(normal);
-    }
-
-    > li > a:hover {
-        .text(highlight);
-        background-color: @background-color-highlight;
-    }
-}