Make issuable filter dropdown style consistent

app/assets/stylesheets/framework/dropdowns.scss

@@ -728,18 +728,27 @@
 @mixin new-style-dropdown($selector: '') {
   #{$selector}.dropdown-menu,
   #{$selector}.dropdown-menu-nav {
-    .divider {
-      margin: 6px 0;
-    }
-
     li {
       padding: 0 1px;
 
+      &:hover {
+        background-color: transparent;
+      }
+
+      &.divider {
+        margin: 6px 0;
+
+        &:hover {
+          background-color: $dropdown-divider-color;
+        }
+      }
+
       &.dropdown-header {
         padding: 8px 16px;
       }
 
-      a {
+      a,
+      button {
         border-radius: 0;
         padding: 8px 16px;
 
@@ -753,6 +762,7 @@
         &:active,
         &:focus {
           background-color: $gray-darker;
+          color: $gl-text-color;
         }
 
         &.is-active {

app/assets/stylesheets/framework/filters.scss

@@ -50,6 +50,8 @@
 }
 
 .filtered-search-wrapper {
+  @include new-style-dropdown;
+
   display: -webkit-flex;
   display: flex;
 
@@ -411,8 +413,6 @@
 }
 
 %filter-dropdown-item-btn-hover {
-  background-color: $dropdown-hover-color;
-  color: $white-light;
   text-decoration: none;
   outline: 0;
 
@@ -422,8 +422,6 @@
 }
 
 .droplab-dropdown .dropdown-menu .filter-dropdown-item {
-  padding: 0;
-
   .btn {
     border: none;
     width: 100%;

app/views/shared/issuable/_search_bar.html.haml

@@ -57,7 +57,7 @@
                 %li.filter-dropdown-item{ data: { value: 'none' } }
                   %button.btn.btn-link
                     No Assignee
-                %li.divider
+                %li.divider.droplab-item-ignore
                 - if current_user
                   = render 'shared/issuable/user_dropdown_item',
                     user: current_user
@@ -76,7 +76,7 @@
                 %li.filter-dropdown-item{ 'data-value' => 'started' }
                   %button.btn.btn-link
                     Started
-                %li.divider
+                %li.divider.droplab-item-ignore
               %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
                 %li.filter-dropdown-item
                   %button.btn.btn-link.js-data-value
@@ -86,7 +86,7 @@
                 %li.filter-dropdown-item{ data: { value: 'none' } }
                   %button.btn.btn-link
                     No Label
-                %li.divider
+                %li.divider.droplab-item-ignore
               %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
                 %li.filter-dropdown-item
                   %button.btn.btn-link