add mixin for full size (100%) icon

Author: vas3a

src-ts/lib/styles/mixins/_icons.mixins.scss

@@ -40,6 +40,11 @@
     width: $space-mxx;
 }
 
+@mixin icon-full {
+    height: 100%;
+    width: 100%;
+}
+
 @mixin icon-size($size) {
     height: $size * 1px;
     width: $size * 1px;

src-ts/tools/learn/learn-lib/course-outline/status-icon/StatusIcon.module.scss

@@ -4,7 +4,6 @@
     @include icon-size(26);
     flex: 0 0 auto;
     svg {
-        width: 100%;
-        height: 100%;
+        @include icon-full;
     }
 }

src-ts/tools/learn/learn-lib/course-outline/step-icon/StepIcon.module.scss

@@ -22,8 +22,7 @@
         background: $black-40;
 
         > svg {
-            height: 100%;
-            width: 100%;
+            @include icon-full;
             margin: -1 * $border;
         }
     }