The only time we set the `home` flag to true
is when it's the last (and only) item in the
list, in which case we flip `hash` to false
at the end of `make_tab_data()`.
So the section of code where both `home` and
`flag` were true is dead code.
Also, we can use `else` instead of `unless`.
We made this change because users often unnecessarily click "Home"
first in their use of Zulip, because it seems appealing. While "All
messages" isn't quite precise (it doesn't include muted streams), it
does describe relatively simply the interleaved view that this
represents.
This commit leaves everything as "home" in the code, and only changes
user-visible strings and docs. Changing the code will be a big project;
there are hundreds of relevant occurrences in variable names, etc.
Further, we'll probably want to convert those various variable names
in different ways.
Tweaked by tabbott to extend the commit message and update a few comments.