Fix the contrast on the type of alert text on full page alert banners (…

…#362)

* Fix the contrast on the type of alert text on full page alert banners

Fix #361

Use color: inherit instead of overriding with a value

* Remove a and p tags from full page alert colour inherit

These are providing redundent overrides so can be removed

modules/localgov_alert_banner_full_page/css/full-page-alert-banner-layout.css

@@ -22,10 +22,8 @@ dialog + .backdrop {
 	background: rgba(0, 0, 0, 1) !important;
 }
 
-.localgov-alert-banner-full h1,
-.localgov-alert-banner-full p,
-.localgov-alert-banner-full a {
-	color: #FFFFFF;
+.localgov-alert-banner-full h1 {
+	color: inherit;
 }
 
 .localgov-alert-banner-full > .localgov-alert-banner-full--centered {