This commit has us piggy back the conditional for narrow_description
off of the conditional for sub_count, the reason for this approach is
that "narrow_description" needs to handle four unique cases:
- The stream exists and has a description.
- The stream exists and does not have a description.
- The stream does not exist and we must render appropriate text.
- We are not in a stream narrow and the span should not be rendered.
By piggy backing off of sub count we can get the first and last case,
with the inner conditional (on rendered_narrow_description) handling
the second case and the tab_bar.js passing appropriate values to the
template to handle the third case.
This unfortunately makes the template more brittle such that breakage
of the subcount can cause breakage (non rendering) of the description
as well.
This updates the logged-in top navbar to display the stream/message
name, number of users, and description. It also replaces the search
bar with a search icon that expands into a full-width search bar.
Co-authored-by: Max Nussenbaum <max@maxnuss.com>
Fixes: #164.
Fixes: #5198.
YashRE42
Tim Abbott
Anders Kaseorg