To-do
-----

 * Fix the warnings about orphaned slots

 * Fix the excessive memory usage when zooming in

 * Either preserve the relative scroll area center when zooming, or reset to
   the center of the view instead of the top-left corner.

 * Try to determine what's with the random crash on startup when building with
   the Visual C++ compiler

 * [DONE] Look into providing a static build of Qt on Windows instead of those
   tacky DLLs

 * [DONE] Fix dragging functionality issues with the Oxygen style on KDE, and
   its bogus drag-start area on all platforms

 * Fix conflicting signals causing interaction issues when trying to type a
   color by RGB code in the palette editor (this does not affect the range
   editor)

 * [DONE] Add a menu option to select the desired preview background color

 * [DONE] Make the color picker dialogs modal

 * Add an option to duplicate a color range

 * Add an option to duplicate a palette

 * Add an option to add a comma-separated list of colors to a palette

 * [DONE] Make reading palettes from config actually work