Merge pull request #1006 from aminought/freeze-deletable-fix

Fix cell removing after copying of freezed cell

Author: jcb91

src/jupyter_contrib_nbextensions/nbextensions/freeze/main.js

@@ -93,20 +93,23 @@ define([
         switch (state) {
             case 'normal':
                 cell.metadata.editable = true;
+                cell.metadata.deletable = true;
                 if (cell.metadata.run_control !== undefined) {
                     delete cell.metadata.run_control.frozen;
                 }
                 bg = "";
                 break;
             case 'read_only':
                 cell.metadata.editable = false;
+                cell.metadata.deletable = false;
                 if (cell.metadata.run_control !== undefined) {
                     delete cell.metadata.run_control.frozen;
                 }
                 bg = options.readonly_color;
                 break;
             case 'frozen':
                 cell.metadata.editable = false;
+                cell.metadata.deletable = false;
                 $.extend(true, cell.metadata, {run_control: {frozen: true}});
                 bg = options.frozen_color;
                 break;