Have Django set interactive flag

[tercer]

There is a flag in the frontend javascript called interactive here: https://github.com/TwoRavens/PSI/blob/3727925d4af0df8dd6e5bdf8f22bf50e78054673/assets/code/interface.js#L84

For development purposes, this was set in the javascript, to switch between functionality for when the depositor or the analyst is using the interface. But now we should set this flag from Django, and work out how to best serve the page in these two different modes.

[TurboFreeze]

Important note: the interactive queries version actually uses a different interface. Specifically, when the interactive flag is set to true to run the interactive queries version, then interactiveInterface.html needs to be served instead of interface.html that is currently be served. Therefore, the flag in Django should also incorporate logic regarding which interface to use. I have added the interactiveInterface.html to the \templates directory already.