Interface Improvements to Language pack Export

Improvements to the Language pack export to provide more flexibility as well as make more informative to the users.

[B]Finalized specs[/B]

1. List all modules with Check-boxes in one column

2. List additional info (number of Phrase and Events) next to each
module

3. Provide Select ALL and NONE options above check-boxes.

4. Add text-area where user can specify a list of Phrases or Event to include in the Export separated by new line.