[Dev] AssertionError: Don't have color info in getContainingCollection

[John Anderson]

Hi Alecf:

I noticed that after running a fresh Chandler, generating data, then 
clicking on one of the new collections I get an assert in 
getContainingCollection.

I suspect this is a side effect of the change I made yesterday where the 
Calendar isn't rendered and unrendered when only it's contents are 
changed. So perhaps there is something else that needs to be done when 
the your SetContents handler is called.

John