Merge branch '284_Blank_Theme_multiselect_arrows_are_too_small' of ht…

…tps://github.com/magento/magento2 into pap-b2b-prs

app/design/frontend/Magento/blank/Magento_B2b/web/css/source/actions/_actions-select.less

@@ -0,0 +1,158 @@
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+//
+//  Actions -> Action select
+//  _____________________________________________
+
+//
+//  Variables
+//  _____________________________________________
+
+@color-blue-pure: #007bdb;
+
+@action__height: 3.2rem;
+@action__width: 3.2rem;
+
+//  Triangle marker
+@button-marker-triangle__height: .5rem;
+@button-marker-triangle__width: .8rem;
+
+@button__border-color: @color-gray68;
+
+@action__border-color: @color-gray68;
+@action__active__border-color: @action__border-color;
+@action__hover__border-color: @action__border-color;
+
+@action-select__disabled__color: @text__color;
+@action-select__z-index: @z-index-5;
+
+@field-control__box-shadow: 0 0 3px 1px @color-blue3;
+@field-control__active__border-color: @color-blue-pure;
+@field-control__hover__border-color: @action__hover__border-color;
+
+@_dropdown__padding-right: @action__height;
+@_triangle__height: @button-marker-triangle__height;
+@_triangle__width: @button-marker-triangle__width;
+
+//  Action select have the same visual styles and functionality as native <select>
+.admin__action-group-wrap {
+    @_action-select__border-color: @button__border-color;
+    @_action-select__active__border-color: @action__active__border-color;
+    @_action-select-toggle__size: @action__height;
+
+    display: inline-block;
+    position: relative;
+
+    .action-select {
+        .lib-text-overflow();
+
+        background-color: @color-white;
+        font-weight: @font-weight__regular;
+        text-align: left;
+
+        &:hover {
+            border-color: @color-gray68;
+
+            &:before {
+                border-color: @field-control__hover__border-color;
+            }
+        }
+
+        //  Toggle action
+        &:extend(.abs-icon-add all);
+
+        &:before {
+            align-items: center;
+            content: @icon-down;
+            display: flex;
+            font-size: 24px;
+            justify-content: space-around;
+            line-height: 1;
+            position: absolute;
+            right: 0;
+            width: @action__width;
+        }
+
+        &._active {
+            &:before {
+                content: @icon-up;
+            }
+        }
+
+        &[disabled] {
+            color: @action-select__disabled__color;
+        }
+
+        &._mage-error {
+            border: 1px solid @form-element-validation__border-error;
+        }
+    }
+
+    &._focus {
+        .action-select {
+            &._mage-error {
+                border: 1px solid @form-element-validation__border-error;
+            }
+        }
+    }
+
+    &._active {
+        z-index: @action-select__z-index;
+
+        .action-select {
+            &:before {
+                content: @icon-up;
+            }
+        }
+
+        .action-menu {
+            .lib-css(box-shadow, @field-control__box-shadow);
+        }
+    }
+
+    .action-menu {
+        border: 1px solid @action__border-color;
+        display: none;
+        max-height: 45rem;
+        overflow-y: auto;
+
+        &._active {
+            display: block;
+        }
+
+        ._disabled {
+            &:hover {
+                background: @color-white;
+            }
+
+            .action-menu-item {
+                cursor: default;
+                opacity: .5;
+            }
+        }
+    }
+
+    .action-menu-items {
+        left: 0;
+        position: absolute;
+        right: 0;
+        top: 100%;
+
+        > .action-menu {
+            min-width: 100%;
+            position: static;
+
+            .action-submenu {
+                position: absolute;
+                right: -100%;
+            }
+        }
+    }
+
+    .validate-select-field {
+        .lib-visually-hidden();
+    }
+}