Stack.js: Set landing button to is-info when PR has landed (bug 2002900) r=zeid

Pull request: #765

Author: shtrom

src/lando/static_src/legacy/js/components/Stack.js

@@ -75,7 +75,7 @@ $.fn.stack = function() {
                 if (result.status == "landed") {
                     var message = "Pull request landed"
                     pull_request_button.prop("disabled", true);
-                    pull_request_button.removeClass("is-loading").addClass("is-danger");
+                    pull_request_button.removeClass("is-loading").addClass("is-info");
                     pull_request_button.html(message);
                     $("#blockers").html(`${message}.`);
                     $("#warnings").html(`${message}.`);