#5 Configuration Dialogs

[Wilson Waters]

Pointer dialog
- implement Pointer initial pause in ConfigPointer
and Pointer.
- implement Pointer scroll time in ConfigDialog.
- implement Pointer "underscan time" in ConfigDialog
(do we really need this?).

Keyboard
- modify Config class to handle multiple
ConfigKeyboardLayout classes
- add layout name to DTD and ConfigKeyboardLayout
(ie: us-en)

Device dialog
- create device dialog
- scan /dev/input/* for new events and record it
(similar to IR capture).

Applet dialog
- implement events modification