fix: use category name and emoji when only one category is selected

[edrcq]

fix: use category name and emoji when only one category is selected

Versioning information

• [X] This includes minor changes (minimal usage changes, minor new features)
• [X] This includes patches (bug fixes)
• [X] This does not change functionality at all (code refactoring, comments)

Is this related to an issue?

Related issue: #450

Changes made

I changed the behavior of creating a new panel. It now use the category name and emoji if only one Category is selected. I changed the style by the Secondary style like if we choose multiple categories.

Confirmations

• I have updated related documentation (if necessary)
• My changes use consistent code style
• My changes have been tested and confirmed to work

[eartharoid]

As discussed at https://ptb.discord.com/channels/451745464480432129/1123942139173286059, the button is intentionally different when only one category is selected because a single button that says "Create a ticket" makes a lot more sense than a lonely button that says "Billing". For that reason, I don't consider this PR an improvement so I am going to close it.

I will keep the related issue (#450) open because making the single button customisable is a possibility.