Cleanup code & make sure it has a common code style

src/styles/utilities/animations.scss

@@ -1,4 +1,3 @@
-
 @-webkit-keyframes bounce {
   from,
   20%,

src/styles/utilities/transitions.scss

@@ -1,6 +1,7 @@
 .fade-enter-active, .fade-leave-active {
   transition: opacity $transition-duration;
 }
+
 .fade-enter, .fade-leave-to {
   opacity: 0;
 }
@@ -8,6 +9,7 @@
 .width-enter-active, .width-leave-active {
   transition: width $transition-duration;
 }
+
 .width-enter, .width-leave-to {
   width: 0;
 }