tree d933916dae0e570bac6335b7411c0c9a406c57ff
parent cde1d8d1edb0c8001a28a2a674c46b5a581439db
author Joe Wilm <joe@jwilm.com> 1530888310 -0700
committer Joe Wilm <joe@jwilm.com> 1530888310 -0700

Disable scroll buffer for "alt" Grid

The scroll history size for the alternative grid (used by fullscreen
apps such as vim and tmux) is now forced to zero. There are two
motivations for this change:

1. According to the literature, the alt screen should not have scroll
   history.
2. Reduce memory consumption by only allocating the single scroll
   history.

In the future, it may be desirable to support a configuration option to
enable a scroll buffer for the alt screen. By launching without this
feature, we can delay a decision about whether to officially support
this or not.