Fixed ERROR when ProgressDialog auto-closed itself
Initial color selection dialog implementation
[color-selection] added color preview and hex value
moved hex string conversion to utils.cpp
window-icon option implemented
* align buttons to right side
* use BString instead of char arrays in most places
* comply with Haiku Coding Guidelines
* update --help text
* version 0.4
* added HSV to color selection dialog
* updated help
Initial notification icon implementation