rich_editor.js fails if some action performed while there is no selection

[zoopolitic]

If activity was recreated (for instance if Do not keep activities option enabled) and you try to perform some action, for example insert image, editor fails in line:

range.setStart(RE.currentSelection.startContainer, RE.currentSelection.startOffset);

and nothing is inserted. Fix w/o modifying .js file is to call editor.focusEditor() before actions:

        editor.focusEditor();
        editor.insertImage("url", "image");

How to reproduce issue: add pick image feature where image is returning in onActivityResult and enable Do not keep activities option under Developer options.