Send gradebook update to server even if value hasn't changed
Send gradebook update to server even if value hasn't changed

If a user is in the gradebook and clicks on a value and hits
"enter" then it should always send a request to the server,
even if they haven't changed the value.

fixes #3633

Change-Id: I08d84ce8deb421632766dcce5b65d286d3c5ca41
Reviewed-on: https://gerrit.instructure.com/2091
Reviewed-by: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>
Tested-by: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>

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