Credit fixes

- Fixed receipt page button
- Fixed message on dashboard

ECOM-2492

lms/static/js/commerce/views/receipt_view.js

@@ -288,7 +288,11 @@ function completeOrder(event) {     // jshint ignore:line
         providerId = $(event).data("provider"),
         $errorContainer = $("#error-container");
 
+    try {
         event.preventDefault();
+    } catch (err) {
+        // Ignore the error as not all event inputs have the preventDefault method.
+    }
 
     analytics.track(
         "edx.bi.credit.clicked_complete_credit",

lms/templates/dashboard/_dashboard_credit_info.html

@@ -23,7 +23,7 @@
         % if not credit_status["purchased"] and not credit_status["error"] :
             <p class="message-copy credit-msg credit-eligibility-msg">
                 ## Translators: provider_name is the name of a credit provider or university (e.g. State University)
-                ${_("You are now eligible to purchase course credit from {provider_name} for this course. Click <strong>Get Credit</strong> to get started.").format(
+                ${_("You are now eligible to purchase course credit for this course. Click <strong>Get Credit</strong> to get started.").format(
                     provider_name=credit_status["provider_name"],
                 )}
             </p>