Add a cleanup framework

[sunilshetye]

Add a cleanup framework for input of parameters of the blocks on double clicking them. Any input in the popup will be cleaned up. There is no failure in this cleanup process.

Design a simple input box with multiple fields and a submit + cancel buttons. For each input field, add cleanup types. After cleanup, the input value may be modified. On submission, the submit box should close. Here are some sample cleanup types:

• removespaces (all spaces will be removed)
• replacesemicolonwithcomma (all ; will be replaced with ,)

It should be easy to add more types later. This can also be implemented using a third-party free/libre and open source framework (this should be clearly mentioned in the submission).

e.g. A field can have these cleanup types: "removespaces,replacesemicolonwithcomma".