refactor: add fill-gaps utility

scss/utilities/_index.scss

@@ -1,6 +1,7 @@
 @charset "utf-8";
 
 @import "animations.scss";
+@import "fill-gaps.scss";
 @import "icon-mixin.scss";
 @import "rounded-corners-mixin.scss";
 @import "visually-hidden.scss";

scss/utilities/fill-gaps.scss

@@ -0,0 +1,5 @@
+// Fill gaps in pixel art dots
+// `transform` property conflict when used for nes-icon
+@mixin fill-gaps() {
+  transform: rotate(0);
+}

scss/utilities/icon-mixin.scss

@@ -51,7 +51,6 @@
   height: $size;
   color: $default-color;
   box-shadow: unquote($ret);
-  transform: rotate(0.0001deg);
 
   // firefox only style
   @supports (-moz-appearance: meterbar) {