A simple theme component to add the + New Topic button to the header. The button will show on every page - even inside topics.
Github repository link
See it live on Theme Creator:
Follow the official guide for theme installation:
This component has 3 settings where you can choose the button icon, the button text, and whether or not to hide the default “New topic” button:
This is based on @techAPJ’s tutorial here:
And on @dalerka’s patch to make things work with newer versions of Discourse here:
I only put it all together and added the theme settings to make things simple.