[IMP] mitigate disappearance of empty inline cke widgets

bzr revid: xmo@openerp.com-20131014112644-f95lqkr6j2nlm98a

addons/website/static/src/css/editor.css

@@ -163,6 +163,11 @@ table.editorbar-panel td.selected {
   display: none !important;
 }
 
+.cke_widget_editable:empty:after {
+  content: " ";
+  white-space: pre-wrap;
+}
+
 /* ---- SNIPPET EDITOR ---- */
 #oe_snippets {
   position: fixed;

addons/website/static/src/css/editor.sass

@@ -145,6 +145,11 @@ table.editorbar-panel
 // "remove" drag & drop of CKE widgets
 .cke_widget_drag_handler_container
     display: none !important
+// prevent inline widgets from entirely disappearing when their (textual)
+// content is removed
+.cke_widget_editable:empty:after
+    content: " "
+    white-space: pre-wrap
 
 /* ---- SNIPPET EDITOR ---- */