* Display information of character block and general category.

* Provide a way to access (or search) a character directly by number.

* Provide a way to repopulate database if desired.

* Implement a list of "favorite" Unicode characters?

* Comment the code!...

* Fix the bug that cancelling the textFilter returns to an incorrect
  position (hard: this seems to be a bug in the way ArrayAdapter and
  ListView talk to each other).