Unfortunately there is not a way to disable the control shortcuts, however in Jive Cloud some of the Control option have been removed such as control+B, Control+I, and Control+K.
If you would like to see all the Control shortcuts with the option to enable/disable, I would recommend creating an Idea for the feature here Ideas for Jive this would allow others to vote it up and help it gain visibility with our Products team. This document provides the new process in which ideas get reviewed by our Team Welcome to the New Ideas for Jive
For anyone that does not have access to the space, this blog provides steps on how to obtain it How to Submit Product Feedback in 'Ideas for Jive'
Hope this helps.