- add PgUp/PgDown to scroll down Drawings which are bigger than screen
- add select-top (
zs) to select the topmost item under cursor
- Ensure drawings and backing sheets have different names
- new sheets now unnamed if /usr/share/dict/words not available
- visidata: 474d38 ENTER pushes copy of source sheet with cursor rows
- visidata: 9c6d36 fix duplicate columns in backing sheet