IE11: Login form needs full flex shorthand

IE11: Login form needs full flex shorthand

diff --git a/app/assets/stylesheets/desktop/login.scss b/app/assets/stylesheets/desktop/login.scss
index 8cf8e0b..86a46bf 100644
--- a/app/assets/stylesheets/desktop/login.scss
+++ b/app/assets/stylesheets/desktop/login.scss
@@ -5,7 +5,7 @@
 .create-account {
   #login-buttons:not(.hidden) {
     display: flex;
-    flex: 0;
+    flex: 0 1 auto;
     flex-direction: column;
     align-items: stretch;
     min-height: 75px;

GitHub sha: 80b35600