Adds standard styling for header, cart, and search

Applies new styling to the header, shopping cart, and search bar components.
Creates new scss files for header and swiper layouts.
Replaces x.svg.

These changes create a more consistent and modern user interface.

falcon/modules/is_searchbar/views/templates/hook/is_searchbar.tpl

@@ -0,0 +1,17 @@
+<div class="header-top__block header-top__block--search col-12 col-md mt-2 mt-lg-0">
+	<div id="search_from">
+		<form class="search-form js-search-form" data-search-controller-url="{$ajax_search_url}" method="get" action="{$search_controller_url}">
+			<div class="search-form__form-group">
+				<input type="hidden" name="controller" value="search">
+				<input class="js-search-input search-form__input form-control"
+					   placeholder="{l s='Enter what you are looking for' d='Modules.Issearchbar.Form'}"
+					   type="text"
+					   name="s"
+					   value="{$search_string}">
+				<button type="submit" class="search-form__btn btn">
+					<span class="material-icons">search</span>
+				</button>
+			</div>
+		</form>
+	</div>
+</div>