Bypass the rendering pipeline for highlighting to reduce (eliminate) latency

Fixes #15

architype.css

@@ -141,6 +141,14 @@ body {
   background-color: var(--label);
 }
 
+.editor li.label.highlight {
+  background: repeating-linear-gradient(
+    -45deg,
+    transparent 0 10px,
+    rgba(255,0,0,0.3) 10px 20px
+  ), var(--label);
+}
+
 .editor li.help {
   padding: 10px;
   font-size: 16px;
@@ -260,6 +268,10 @@ body {
   text-align: center;
 }
 
+.gridGraphLabel.highlight {
+  color: var(--focus);
+}
+
 .gridGroup {
   width: 100%;
   height: 100%;
@@ -283,14 +295,12 @@ body {
   overflow: hidden;
   overflow-wrap: anywhere;
   z-index: 1;
-  pointer-events: none;
 }
 
 .gridLines {
   width: 100%;
   height: 100%;
   z-index: 2;
-  pointer-events: none;
   --line-color: var(--line);
 }
 
@@ -307,7 +317,6 @@ body {
   z-index: 3;
   border-radius: 4px;
   padding: 3px;
-  pointer-events: none;
 }
 
 .gridArrow {