2138 - Change cancel button to uploading button for CSV

app/assets/sass/uswds/_main.scss

@@ -344,3 +344,17 @@ h2.recipient-list {
     }
   }
 }
+
+// Button ellipses loading
+
+.dot-anim::after {
+  content: '.';
+  animation: dotPulse 1.5s steps(3, end) infinite;
+}
+
+@keyframes dotPulse {
+  0%   { content: ''; }
+  33%  { content: '.'; }
+  66%  { content: '..'; }
+  100% { content: '...'; }
+}

app/assets/sass/uswds/styles.scss

@@ -1,5 +1,5 @@
 @forward "uswds-theme";
 @forward "uswds";
 @forward "uswds-theme-custom-styles";
-@forward "legacy-styles";
+@forward "main";
 @forward "data-visualization";