minor fixes and tweaks...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ui (gen4)/css/layout.less

@@ -727,6 +727,8 @@ stretching in width... */
 	text-align: center;
 	text-overflow: ellipsis;
 	/*font-size: 2vh;*/
+
+	pointer-events: none;
 }
 
 .crisp-resize .image {

ui (gen4)/features/ui.js

@@ -1429,8 +1429,10 @@ var ControlActions = actions.Actions({
 					// 		us...
 					// 		XXX not fully sure if the reason here is
 					// 			correct, but the thing works...
-					var w = img.attr('preview-width')
-					var h = img.attr('preview-height')
+					// NOTE: preview-width/preview-height can be unset 
+					// 		for blank image blocks or virtual images...
+					var w = img.attr('preview-width') || W
+					var h = img.attr('preview-height') || H
 
 					// normalize preview size to image block size...
 					var s = Math.min(W/w, H/h)

ui (gen4)/features/virtual-images.js

@@ -27,6 +27,7 @@ var VirtualImagesActions = actions.Actions({
 	// 
 	// XXX do better arg processing -- handle metadata correctly...
 	// XXX add export support for this type of stuff...
+	// 		text -> file.txt
 	// XXX add default named templates...
 	// XXX add svg templates???
 	makeVirtualBlock: ['- Virtual/',
@@ -92,10 +93,6 @@ var VirtualImagesActions = actions.Actions({
 				text: text || '',
 			}) }],
 
-	// XXX virtual block editor UI...
-	// XXX
-
-
 	// XXX export...
 })
 
@@ -119,11 +116,13 @@ module.VirtualImages = core.ImageGridFeatures.Feature({
 
 
 
-
 //---------------------------------------------------------------------
 
 var VirtualImagesUIActions = actions.Actions({
+
+	// XXX virtual block editor UI...
 	// XXX
+
 })
 
 var VirtualImagesUI =