Program detail page touchups

Center cards and add padding around logos. ECOM-4871.

lms/static/sass/elements/_course-card.scss

 .course-card {
-  @include span(10);
-  margin-left: $baseline*2;
-  margin-bottom: $baseline;
+  width: 85%;
+  margin: {
+    left: auto;
+    right: auto;
+    bottom: $baseline;
+  }
   padding: $baseline/2 0;
 
   .section {

lms/static/sass/views/_program-details.scss

@@ -26,10 +26,11 @@
         background: palette(grayscale, white-t);
         opacity: 0.7;
         left: 0;
+        padding: 20px;
     }
 
     .org-logo {
-        height: 80px;
+        height: 50px;
     }
 
     .breadcrumb-wrapper {