Add Math Input

[shortyishere]

Mycodo Issue Report:

• Specific Mycodo Version: 7.0.0

Problem Description

Please list:
When I go to add a math block it shows only average multiple input on the drop down list but when i add it it has the right math block.

Probably just need to change the descriptor

• what were you trying to do
• specific setup details that are involved

Errors

• List any errors you encountered.
• Copy and pasting crash logs, or link to any specific
  code lines you've isolated (please use GitHub permalinks for this)

Steps to Reproduce the issue:

How can this issue be reproduced?

1. step 1
2. step 2...
3. etc

Additional Notes

Is there anything that should be added to make it easier
to address this issue?

[kizniche]

Well, I don't know how I let that slip. Thanks for the report. I fixed this in the last commit, and will be live in the 7.0.1 release.