Make member permission dropdowns consistent

app/assets/stylesheets/framework/dropdowns.scss

@@ -729,6 +729,7 @@
   #{$selector}.dropdown-menu,
   #{$selector}.dropdown-menu-nav {
     li {
+      display: block;
       padding: 0 1px;
 
       &:hover {

app/assets/stylesheets/pages/members.scss

@@ -55,6 +55,10 @@
       display: -webkit-flex;
       display: flex;
     }
+
+    .dropdown-menu.dropdown-menu-align-right {
+      margin-top: -2px;
+    }
   }
 
   .form-horizontal {
@@ -306,3 +310,7 @@
     }
   }
 }
+
+.member-form-control {
+  @include new-style-dropdown;
+}