Add invalid selection error message

[ddriddle]

In previous releases an invalid selection caused a traceback to be
printed to the user. In the current release no error message is
displayed. With this commit an error message is issued to the user
on an invalid selection. This is sufficient since the user does not
need to reauthenticate on additional login attempts.

[edthedev]

Since I assume this will result in a .1 point release, we should include a ChangeLog.md update.

[edthedev]

Let's include a ChangeLog update.

[JonRoma]

I agree with the suggestion about updating ChangeLog, and have two comments of my own.

[ddriddle]

@edthedev do we have a team standard for the format of the change log? I know Rokwire has one that is decent. Also should I go back through the history and write up a change log for each version release?

[edthedev]

@ddriddle Yes, we use the same standard as Rokwire - https://keepachangelog.com/en/1.0.0/

It would be neat to have ChangeLog for past releases, but I've also just ended the ChangeLog file with a link to the Git releases that says "For older versions, see ... "

[mpitcel]

@ddriddle Yes, we use the same standard as Rokwire - https://keepachangelog.com/en/1.0.0/

It would be neat to have ChangeLog for past releases, but I've also just ended the ChangeLog file with a link to the Git releases that says "For older versions, see ... "

I just recommended this website to @JonRoma :)

[mpitcel]

I am ready to approve pending CHANGELOG updates

[ddriddle]

@JonRoma and @edthedev I have added a CHANGELOG entry. Please add your approval when you have some time.