This is the first step in cleaning up the bot edit code.
Since the bot edit form appears dynamically, we remove
it from the static HTML scaffold, of which settings_sidebar
is a part of.
The label element for the bot name editing field was trying to use
a "for" attribute to link it to the input field, but the field had
no ID for it to associate with. Added the ID value which it
was trying to use.
Fixes#4999.
We had never-enabled code to allow users to set default
streams for their bots (for event registration, default sending, etc.).
This commit removes the code.