Created by: zeffii
- fix parenthesized output / input read
- create MK2 of TextIn and TextOut
- UI backend streamline
- reorder imports
- introduce common util for TextIO nodes (including operator:
utils/sv_text_io_common) - place Text Nodes within Text Category.
- move over to text=Stringproperty and obtain textblock using prop_search on
bpy.data.texts. - some logic shortcutting.