ensure handlers are attached to  dynamically added modal invokers
Issue 3900: Add Marked for Later to Clear History warning message and make message more scary
Merge pull request #1497 from tuff-ghost/issue_2356

2356: ensure handlers are attached to  dynamically added modal invokers
Merge pull request #1570 from LadyOscar/issue_3900

Issue 3900: Add Marked for Later to Clear History warning message