Feature: add support for type Enum to entries of file template options
Summary:
Allows to add custom options to file templates where the user
can select one value out of a list of predefined values.
Reviewers: KDevelop, mwolff
Reviewed By: KDevelop, mwolff
Subscribers: mwolff, kdevelop-devel
Differential Revision: https://phabricator.kde.org/D4339