diff --git a/ui (gen4)/features/marks.js b/ui (gen4)/features/marks.js
index 004771f3..fed53cb7 100755
--- a/ui (gen4)/features/marks.js	
+++ b/ui (gen4)/features/marks.js	
@@ -353,12 +353,12 @@ var ImageMarkEditActions = actions.Actions({
 		shiftMarked('down')],
 
 	// XXX undo...
-	shiftMarkedAfter: ['Mark|Image/Shift marked after',
+	shiftMarkedAfter: ['Mark|Image/Shift marked $after',
 		{browseMode: 'cropMarked'},
 		function(target){
 			this.shiftImageTo(this.marked, target || 'current', 'after') }],
 	// XXX undo...
-	shiftMarkedBefore: ['Mark|Image/Shift marked before',
+	shiftMarkedBefore: ['Mark|Image/Shift marked $b$efore',
 		{browseMode: 'cropMarked'},
 		function(target){
 			this.shiftImageTo(this.marked, target || 'current', 'before') }],
diff --git a/ui (gen4)/imagegrid/data.js b/ui (gen4)/imagegrid/data.js
index 8be41cab..9f820831 100755
--- a/ui (gen4)/imagegrid/data.js	
+++ b/ui (gen4)/imagegrid/data.js	
@@ -1626,6 +1626,7 @@ var DataPrototype = {
 						delete that.ribbons[from][f]
 					}
 				})
+			this.clear('empty')
 		}
 		
 		// horizontal shift -- gather the images horizontally...
diff --git a/ui (gen4)/package.json b/ui (gen4)/package.json
index 8c9125f2..3fd0906d 100755
--- a/ui (gen4)/package.json	
+++ b/ui (gen4)/package.json	
@@ -26,6 +26,7 @@
     "ig-features": "^3.2.7",
     "ig-object": "^1.0.2",
     "openseadragon": "^2.3.0",
+    "pica": "^3.0.6",
     "preact": "^8.2.5",
     "react": "^15.6.1",
     "react-dom": "^15.6.1",