Fix hover effect on Log in and Sign up nav items (#1085)

* Fix hover effect on Log in and Sign up nav items

* Fix Login and Signup unequal spacing

* Fix HTML syntax and right nav__item-header hover

Author: shanrauf

client/styles/components/_nav.scss

@@ -85,6 +85,16 @@
 	margin-left: #{5 / $base-font-size}rem;
 }
 
+.nav__dropdown {
+  @include themify() {
+      color: getThemifyVariable('nav-hover-color');
+    }
+}
+
+.nav__item-header-triangle {
+	margin-left: #{5 / $base-font-size}rem;
+}
+
 .nav__dropdown {
   @extend %dropdown-open-left;
   display: none;