set the fg or bg color if ctrl or alt is held. use the new dropper cursor.
* app/paint_core.[ch]: set the fg or bg color if ctrl or alt is held. use the new dropper cursor. * app/cursorutil.[ch], app/gdisplay.[ch], app/rect_select.c: Use GimpCursorType enum values > GDK_CURSOR_LAST instead of seperate functions to choose between cursor types. * app/color_picker.c: use the new dropper cursor. * app/paintbrush.c, app/airbrush.c, app/paintbrush.c: use the new color picking feature of paint_core. * cursors/dropper, cursors/droppermsk: new cursor for the color picker tool. (this cursor is REALLY ugly, someone should fix it)