chore(ui): increase btn radius

src/styles/base/_mixins.scss

@@ -2,7 +2,7 @@
   background: $background-gradient;
   border: 1px solid;
   border-color: $border-color;
-  border-radius: 2px;
+  border-radius: 4px;
   width: 100%;
   text-transform: initial;
   span:first-child {