Slightly refactor controls for repositioning.

blocks.js

@@ -48,12 +48,8 @@ function selectBlock( event ) {
 	event.stopPropagation();
 	event.target.className = 'is-selected';
 
-	var position = event.target.getBoundingClientRect();
-
-	// Show switcher
-	controls.style.opacity = 1;
-	controls.style.top = ( position.top + 18 ) + 'px';
 	selectedBlock = event.target;
+	showControls( selectedBlock );
 }
 
 function clearBlocks() {
@@ -65,6 +61,12 @@ function clearBlocks() {
 	hideControls();
 }
 
+function showControls( node ) {
+	var position = node.getBoundingClientRect();
+	controls.style.opacity = 1;
+	controls.style.top = ( position.top + 18 ) + 'px';
+}
+
 function hideControls() {
 	controls.style.opacity = 0;
 }
@@ -128,6 +130,9 @@ function swapNodes( a, b ) {
 		return false;
 	}
 
+	// how do we handle controls?
+	showControls( b );
+
 	// insert node copies before removal
 	parent.replaceChild( b.cloneNode( true ), a );
 	parent.replaceChild( a.cloneNode( true ), b );