Merge branch 'v4-dev' into yiq-function-update

scss/_navbar.scss

@@ -74,6 +74,13 @@
     position: static;
     float: none;
   }
+
+  .dropdown-toggle {
+    &::after {
+      border-top: $caret-width solid;
+      border-bottom: 0;
+    }
+  }
 }
 
 
@@ -144,6 +151,18 @@
           padding-right: 0;
           padding-left: 0;
         }
+
+        .dropup {
+          .dropdown-menu {
+            position: absolute;
+            top: auto;
+            bottom: 100%;
+          }
+
+          .dropdown-toggle {
+            @include caret(up);
+          }
+        }
       }
 
       @include media-breakpoint-up($next) {