sens: use assets for banner and logo (#47594)

static/sens/_custom.scss

@@ -1,17 +1,17 @@
 @import '../includes/fonts/bitter';
 @import '../includes/fonts/worksans';
 
-div#header-wrapper {
-	background: url(img/background.jpg) no-repeat;
-	background-size: auto;
+body.has-header-background .site-header {
 	background-attachment: fixed;
+}
+
+div#header-wrapper {
 	height: 295px;
 	div#header h1 {
 		padding-top: 80px;
 		a {
 			display: block;
 			height: 120px;
-			background: url(img/ville-sens-logo.svg) top left no-repeat;
 			background-position-x: center;
 			text-indent: -1000px;
 			overflow: hidden;

static/sens/config.json

@@ -4,5 +4,13 @@
     "favicon": "sens/img/favicon.png",
     "logo_link_url": "https://www.ville-sens.fr/",
     "theme_color": "#008cd1"
+  },
+  "settings": {
+    "combo": {
+      "COMBO_ASSET_SLOTS.update": {
+        "header:background": { "label": "Têtière : fond" },
+        "header:logo": { "label": "Têtière : logo" }
+      }
+    }
   }
 }