Make cheatsheets more pervasive

We have used cheatsheets in project examples and suggested for use in quickstarts but because they only open when using project example wizard and central imports it is not as easy to get shown to users as we would like.

Suggestion is to make cheatsheets something that gets activated more easily - for example when importing a project with a .cheatsheet.xml file make it show up; be able to double click a cheatsheet.xml file to have it open in cheatsheet viewer as opposed to always the cheatsheet editor and so forth.

This jira will have a few subtasks for specific concerns.