Optimizations:
- Reuse object start address in object table, if same object is used twice in a row.
- Minor optimization affecting all opcodes that read or write property values.
Bugfixes:
- Fixed: If the last line on a screenful of text ended with a character in the rightmost column and then a newline character, the MORE prompt was printed on the next line, thus making the top line scroll off screen when it shouldn't.