PopUp Customisation and Fork / Clone

[squatman86]

Hi there,

I'm trying to do some small customisations to the Creation and Edit Popups.

Remove or Hide the Div/Button/Input - Private, Location, Busy/Free and change the Subject to a dropdown style and hopefully populate it like the Calendar/Event dropdown.

From searching it appears I can either disable the built in popup and create my own custom one, or "Fork" some files in the repository, tweak them and have them form part of my install.

Firstly are these still the only options for customising the PopUp?

Secondly, apologies for being very new to GitHub.

From my searches the files I would need to "Fork" are:

https://github.com/nhnent/tui.calendar/blob/master/src/js/view/popup/scheduleCreationPopup.js
https://github.com/nhnent/tui.calendar/blob/master/src/js/view/template/popup/scheduleCreationPopup.hbs
https://github.com/nhnent/tui.calendar/blob/master/src/js/view/popup/scheduleDetailPopup.js
https://github.com/nhnent/tui.calendar/blob/master/src/js/view/template/popup/scheduleDetailPopup.hbs

This is my first attempt at a Fork / Clone.

When I browse to https://github.com/nhn/tui.calendar/tree/v1 I can see the "src" directory and eventually within it the files I need to modify. The problem is when I "Fork" it seems to only use the files/directories listed here https://github.com/nhn/tui.calendar.

If I try a "Clone" from the desktop application I can only do this on the URL https://github.com/nhn/tui.calendar if I try the URL with the files I need https://github.com/nhn/tui.calendar/tree/v1 it says I don't have authorisation.

I've been searching for a while now and reading guides but I'm still not having any luck, so I'm coming to the community for help please. Hopefully it's something obvious.

Any help would be greatly appreciated.

Thank you in advance.