Updates translated strings in web/ that do not need updates to any
tests. The majority of these strings are also unique to the file/
template that they are in. A few have overlap with one other file.
Some changes here update placeholders/variables in these strings to
no longer use stream so that all the translation updates for this
rename happen at the same time.
The exception to this are cases of "<z-stream>" placeholders in
these translated strings.
Part of the stream to channel rename project.
Fixes#26746
There was a bug which caused empty text to not appear after
rerender since tbody didn't have the `required-text` class on
rerenders as it was not part of the handlebars template.