 Made get_configurable_plugins work nicely with config.jsons that include multiple plugin entries as a list (#2161)
 Made get_configurable_plugins work nicely with config.jsons that include multiple plugin entries as a list (#2161)

* Adds support for config.json to have multiple paths to add to the Plugins dropdown in the Admin Panel
* Closes #1370
CTFd/CTFd,CTFd/CTFd,CTFd/CTFd,CTFd/CTFd