This patch reorganizes the Glare node inputs into panels, grouped by the
function they perform. The panels are:
- Highlights: Which are inputs related to highlights extraction.
- Adjust: Which are inputs that adjusts the generated glare.
- Glare: Which are glare type specific inputs.
Additionally, the Threshold parameter was assigned a more unique
identifier to be more future proof and consistent with other inputs, and
the descriptions of some inputs were updated.
Pull Request: https://projects.blender.org/blender/blender/pulls/132993