updated styling for marketing side register button to accommodate second line of text

lms/static/sass/_shame.scss

@@ -156,6 +156,19 @@
     &.action-register, &.access-courseware {
       @extend .m-btn-primary;
       display: block;
+
+      .track {
+        @include transition(all 0.25s ease-in-out);
+        color: #fff;
+        display: block;
+        font-size: 13px;
+        line-height: 2;
+        opacity: .6;
+      }
+
+      &:hover .track {
+        opacity: 1;
+      }
     }
 
     // already registered but course not started or registration is closed

lms/templates/courseware/mktg_course_about.html

@@ -54,8 +54,9 @@
         %elif allow_registration:
         <a class="action action-register register" href="#">${_("Register for")} <strong>${course.display_number_with_default | h}</strong>
             %if len(course_modes) > 1:
-            <br />
+            <span class="track">
             and choose your student track
+            </span>
             %endif
         </a>
         %else: