TODO (last update: 2008-11-25)
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[X] Try to separe GscPopup and GtkTextView. Remove the GtkTextView dependency 
    to use in anjuta
[X] Create File Words Provider: Provide words from a file
[X] New popup filter type: Hidden filter. The filter will be hidden but 
    programmativally you can change the current filter.
[X] Add function to hide the bottom bar

GscInfo:
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[ ] Add movement functions (center screen, parent, mouse pointer etc.)
[X] Implement adjust height (adjust window height to the content)
[X] Implement adjust width (adjust window width to the content)
[ ] Add bottom bar with extend buttom
[X] Implement set_info_type with sort or extended
[X] Add signal info-type-changed

GscPopup:
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[ ] Change the "display-info" signal and use a proposal function like apply
