ecode: General Improvements.

bin/assets/ui/breeze.css

@@ -40,6 +40,7 @@
 	--floating-icon: #eff0f188;
 	--term-back-color: #1e2127;
 	--term-font-color: #abb2bf;
+	--highlight-primary: #FFFFFF7A;
 	droppable-hovering-color: #FFFFFF20;
 }
 
@@ -195,6 +196,13 @@ CheckBox::active {
 	background-position: center;
 }
 
+tableview::row:selected CheckBox::active,
+treeview::row:selected CheckBox::active,
+listview::row:selected CheckBox::active {
+	border-color: var(--highlight-primary);
+	background-image: rectangle(solid, var(--highlight-primary));
+}
+
 RadioButton::active,
 RadioButton::inactive {
 	width: 12dp;