Latest amends from Hive theme

Author: philwareham

src/sass/modules/_icons.scss

@@ -34,25 +34,25 @@
 
 /**
  * Default state icons.
+ *
+ * TODO: Use `filter: brightness()` in future, instead of dedicated image.
  */
 
-.ui-state-default .ui-icon,
-.destroy .ui-icon {
+.ui-state-default .ui-icon {
     background-image: url("img/ui-icon-sprite-555555.svg");
 }
 
 /**
  * Weighted content icons and interaction state icons.
+ *
+ * TODO: Use `filter: brightness()` in future, instead of dedicated image.
  */
 
 .ui-widget-content .ui-icon,
 .ui-widget-header .ui-icon,
 .ui-state-hover .ui-icon,
 .ui-state-focus .ui-icon,
-.ui-state-active .ui-icon,
-.destroy:hover .ui-icon,
-.destroy:active .ui-icon,
-.destroy:focus .ui-icon {
+.ui-state-active .ui-icon {
     background-image: url("img/ui-icon-sprite-333333.svg");
 }
 
@@ -100,7 +100,8 @@
 
 .ui-state-error .ui-icon,
 .ui-state-error-text .ui-icon,
-.error .ui-icon {
+.error .ui-icon,
+.destroy .ui-icon {
     background-image: url("img/ui-icon-sprite-error.svg");
 }