fix NA values in gfilter, date, boolean
add clear button
add clear button to choice item
merge changes
add some flexibility to use.scrollwindow argument
move NA handling elsewhere, fix all NA issue
move NA choice around, add filter for ChoiceItem when 4 or more objects
work on choice item and filtering
add opts to choice item
use popup menu, not basic dialog
add icon to edit, if possible
check if Filtering leaves 0-length
add r logo
includeNA tweak
in search options use checkbuttons, not radio
add completion option to single choice combobox
add completion option to single choice combobox
tweak completion in single choice
bug fix on includeNA
search after opts selection, force a variable to be selected in dialog