Currently, ``throwError`` is used for all manner of messages, including
errors, "success" messages, and "info" messages. This makes appropriate
styling of the error message difficult. In addition, the name
``throwError`` seems to create confusion, implying that an error will
actually be thrown (e.g. stopping execution when a user isn't logged in
[0][1]), when in fact it just displays a message.
Replace ``throwError`` with ``flashMessage``, and reliably include a
message "type" (e.g. "error", "success", "info") every time. rename
``lib/errors.js`` to ``lib/messages.js`` to more accurately reflect its
function.
This commit doesn't rename the message collection (``Errors``), nor the
template responsible for rendering the messages (``error_item.html``) --
that should probably still be done, but has higher likelihood of
trouble for existing alternate themes and installations.
[0] 6ccf7d7d47/client/views/users/user_edit.js (L43)
[1] 083a4c4dc4/client/views/users/user_email.js (L13)
